You answered all my questions whithout my asking them. You wouldnt blv the hours i ve spent reading and researching the idea of a filter free pond. I'm so glad to be strating from scratch. Thanks so much for a very clear explanation.
I'm a novice in process of building a raised planter with a pond at one end and came to the same conclusion as you have here - that the pump will work much better in a relatively clean water chamber. Allow gravity to do as much of the work as possible. Glad I found this video because I have been posting on a pond forum and copped for some flack.
ITS NICE TO HEAR SOMEONE EXPLAIN THAT --MOST PEOPLE ASSUME EVERYONE KNOWS WHAT THEY ARE TAKING ABOUT AND RATTLE THROUGH THERE EXPLANATION OF DRAINS & FILTERS
Good sharing! I had a gravity fed bottom drain system for my Koi before.. the problem was that after about 2 years..gravel/leaves/sand settled at the bottom of the pipe and choked the whole system. I got a plumber to flush it out with pressure jets but was unable to clear the sediments completly. I got a handy man to seal my bottom drain and did a retro fit piping like yours but added slopes with concrete and have had no issues for the past 5 years.
this is the best explanation of how a system should work. Thanks so much for taking the time to make this vid. Cant wait to get started, gonna try tilapia to replace a large portion of my beef consumption.
Finally! An explanation that went to the point and easy to understand! Thanks a million. I'm planning on building my own, and was questioning every hour witch way to go. Cheers from Portugal
I hope i had seen this tutorial before I started my pond for my koi. Maybe next time of construction I will follow how this type of system works. Watching from the Philippines.
I have been scouring youtube for information like this. Great explanation on design and water flow logic. It will surely help me in building our small koi pond. Two thumbs up !!!
nice and simple explanation, spot on I've a similar pond to yourself, but currently have pump fed filtration with a canister feeding a DIY shower, the water quality visually isnt great although there is no ammonia or nitrites. I'm glad that I can retro fit a bottom drain to my pond anyway! cheers aaron
Check our the “Aqua Art” retro bottom drain marketed in the US. They are the only one that I have seen that use a “side” connection and not a top one which allows the use of a 4 inch pipe which runs along the pond bottom, out of the fish’s way! Not sure of shipping costs but am thinking of ordering one from the U.K. Google:- aqua art retro bottom drain
@@neilryan9664 im new to your channel, thank you for explaining the two difference. Im planning on installing retro fit bottom drain. Initially i was going to use pressurised filter system and already purchased. But i have ppl saying the pressurised filters don't always do the job so I'm contemplating make diy gravity fed filter connected from retro fit bottom. My question is can i have both pressurised filter & gravity fed filter run simultaneously or is it too much? Thanks
Nice explanation. I'm about to improve on a 50m x 8m pond and also build another next to it. I'll be introducing catfish but the ponds are mainly for raising ducks. The fish will benefit but I also want to have health looking water as opposed to green murky water. May go with the retrofit idea on the existing pond but will go with the best solution for new pond. Haven't worked out how much water I'll need to shift per hour yet, size of pump and filter sizes yet!
Great video it helped me a lot. I am making a pond type pool , 3 meters round and it will be 120cm deep with a walk in slop. I want it to look like a pond and it will have a waterfall above it. Its more for looks in the garden but on the hot days i want to walk into it to cool down, my question is do you think the slooing system you mentioned will work for me and waht type of pump do yiu recommend? 🤞🏾
Great video, thanks! Quick question - if you didn't want to put a hole in the pond wall, so no bulkhead, would it be possible to run the pipe up and over the pond wall?
This helps me, I bought a house with the pounds that's build with filtration you describing in the first picture. The pond is quite large so im not sure if I can conver it to your 3rd drowning example
Great video. I'm trying to figure out flow rate and pipe sizes for over stocked pool? Is the whole idea to match the correct pipe size to pump size so there is no draw down in each chamber/barrel so you have a lower flow rate? Or in an over stock koi pond/pool would it be better to oversize my pump to have draw down in each chamber or barrel in my case. I was planning to have two retro fit bottom drain pipes going into my 1st 55 gallon static K1 barrel with both being 2"/50mm pipes, than into the 2nd 55 gallon static K1 barrel with a 3"/76mm pipe, then into my 3rd 55 gallon moving bed K1 barrel, then into my 4th 55 gallon moving bed K1 barrel then to a dry 3500 gph/13248 lph pump back to the pool water fall. I figure a ball valve/gate valve can be closed off before the pump to adjust the flow rate? Thanks all for any help asap.
Really good explanation, thank you. Would the system you have installed work if the pond was below ground level but the filtration system sat above or will it only work if they are both level? I was looking at installing a pipe from the bottom drain up from 4ft out to the filter system, trying to work out the best way to do this. Cheers
Thank you very much for your helpful video. I really like the gravity fed filter design together with the sloped floor fishpond. Do you think this system will also work well for fish farming? How much slope or pitch should the pond floor have? I appreciate it very much if you have time to respond.
It is something I have wanted to do,but am a little bit worried about whether it will suck the koi fry in to the filter. Is that likely to be a problem? By the way brilliant video explaining the system in way that's fool proof.
This is perfect! I am currently rebuilding my pond and this has explained / made me understand this a lot better. I have a couple of questions through, is it literally just gravity / water pressure that sends the water from the bottom drain into the filter? Does it matter where the filter is placed, for instance can it be higher than the pond or does it need to be the same height or lower? and is it worth fitting some sort of valve to stop water coming into the filter to carry out maintenance on the filter or would that just cause problems?
Neil, thanks for putting this all into layman's terms! Out of interest, with the bottom drain scenario, where would one connect a skimmer or is the water from these not worth filtering and is usually just put back into the pond (possibly via jets to introduce movement)?
Skimmer depends again on gravity or pump system. It is definitely worth filtering. Filtering water from the bottom and top of the pond is ideal really. Some people run separate filters for the skimmer and some run it through the same system as the bottom drain
@@neilryan9664 Many thanks for taking the time to reply and for your advice. My skimmer will probably be gravity so I will whack the out-fall through the main filter. I assume I can just T into the main 4" line from the bottom drain to the filter?! Are you able to give advice on Pump sizing...I am really confused what with “water in motion” calcs, the need to “power” a return jets to push the water round the pond and the large total water volume along with turnover recommendations for “healthy” water then add in the question of dry or submerged and my mind is blown! If you are able to help, I have inherited a pond that is completely buggered with a surface area of 90m2 and a water capacity of 86,000 Ltrs. First job will be to line it to stop the leaks!!!
No, not if the filter is installed at the same level as the pond! Think of it like a “spirit level”! An easy way to demonstrate it if you are having trouble grasping the concept is to attach 2 funnels to a 1 meter length of hose, hold them vertically at the same level and get someone to fill one with water. If held level both will have the same water level, if you raise one, water will overflow the other! It’s exactly the same with a pond and filter system, the water will find “the level”!
If you increase your fish stocking density the fish themselves will agitate the water enough to allow flat bottom tank/ponds to self clean with bottom drain or solids lift. Just keep an eye out for nitrogen compounds and oxygen levels.
Hello Neil, How about improving further by placing a drain pipe at the bottom or at the side of your mechanical filter compartment for cleanup, will it be okay? I am about to build my own pond and came across your channel. Thank you.
Well said and awesome. If I go with retrofit type can I connect the pipe and climb up to the wall down to the chamber than to the pump to spillway? Do you think that will work? Or I really need to make a hole on the sidewall to make it work? Thank you so much.
I want to build a waterfall, what about the filters not being on the same water level? will it work? I guess will need an extra pump to get the water all the way to the top of the waterfall
Hi Neil, what size pipe is on your bottom drain? Is it 3 inch? That bulk head fitting can I get it for a 3 inch pipe and if so where can I buy one? Lovely pond by the way :O)
Maybe a silly question but a lot of in pond pumps say that they can’t be used for swim ponds due to the risk of electric shock. Dry run pumps that you sit 2m away and lower than the pond level seem to be more expensive compared to submerged pumps with the same L per hr capacity. So is it safe to put a submersible pump into the filter system fed by a bottom drain, as surely this water is a continuous route of electric conduction back to the pond? Thanks
Neil, can you comment on the type of pump you would use in the 3rd container. I want to use a similar set up for a duck pond and want the pump set up after the mechanical filter due to excessive waste produced by ducks. I have a submersible pump but am not sure that will work.
Hi, I have a question. I have a 5-ft deep pond and my filtration system is 2-ft higher than the pond. Does the gravity filter system works fine? I am still constructing it and it's near completion. Would love to know your thoughts.
Thanks, so a question… with your sloping alternative, wouldn’t all the rotting leaves that sink down get drawn to the inlet at the bottom of the pond and how would you then clear this away from the mesh opening if it’s down there?
If falling leaves are a problem you should run a skimmer with a leaf basket. 4 inch pipes should handle most leaves but a skimmer would definitely help
Correct. I am using a 5000 lph pump and have adequate water flow. The diameter of your pipes will determine how much flow you can run through the system. 100mm pipework will be enough for most pond pumps
Hi. How do you calculate the diameter of the retrofitted bottom drain? I have the problem with flow rates between the settlement chamber and the other two chamber. I have installed 4 50mm pipes coming from the pond into the settlement chamber already. Any help will be greatly appreciated.
Opening the valve on the vortex clears the heavy waste and usually once a week I will blast the brushes with a hose. I have a video on cleaning the filter if you are interested
Hello I am redoing my pond 14x16 " want to install bottom drain on a rubber liner what size drain should I use I have 5 Koi fish now but they are growing need to make bigger for them
It is constantly in movement so it should never stick. Algae etc does occasionally build up in the pipes but it is very easy to purge by closing the bottom drain valve for a few minutes and opening it again
@@neilryan9664 Thanks, Neil. Base from the drawing there is a 90° from the bottom drain and another 90° to the 1st chamber. I was just making sure that the waste wont sit on the pipe that is connected the elbows (90°)
I wouldn't listen to this guy at all most of what he explains is bullshit made up crap, no one puts the pump in the last chamber cause like you said there will be no suction
Iv got a pond set into the ground. Iv fitted a bottom drain but the problem is I cant dig down far enough to sink my nexus 320 to be the same level as the pond water. Can I do a hybrid setup where my little sieve filter is gravity fed then put a pump after that to pump up to the nexus then have that overflow back into the pond?
You've probably done this already 6 months ago but yes it would definitely work and you don't even have to have the nexus above the pond only the internal outlet of the nexus then pipe it up over the pond wall and gravity will do the rest 👍
It's a 50mm pipe. With a couple of elbows etc, the gravity rate would be around 7500lph. Although that flow rate is dictated by pump size, I have a 5000lph pump👍
Look at his drawings, they show the different placement of pump for each type of system! I’m not sure which bit you don’t understand, it’s pretty much self explanatory!
On a gravity feed system you will need to install it in the pumped “return” pipe work as it’s internal dimensions are too small to work on the filter inlet side! On a pump fed system you would do the opposite, installing it in the pumped filter feed with the water returning to the pond by gravity!
![Koi Pond Filters - Gravity fed vs Pump fed [which is best?]](http://i.ytimg.com/vi/xM2s6B9AcSI/mqdefault.jpg)
![Koi Pond Filters - Gravity fed vs Pump fed [which is best?]](/img/tr.png)
You answered all my questions whithout my asking them. You wouldnt blv the hours i ve spent reading and researching the idea of a filter free pond. I'm so glad to be strating from scratch. Thanks so much for a very clear explanation.
The first video I have seen to actually explain in layman's terms how these work. Thank you and well done,
Thank you for this video. A lot of other videos only show the building process without a proper diagram. This makes it easy for novices to understand.
My friend who breeds a lot of Kois always recommends me this! It's amazing how he recommendeds these things.
I'm a novice in process of building a raised planter with a pond at one end and came to the same conclusion as you have here - that the pump will work much better in a relatively clean water chamber. Allow gravity to do as much of the work as possible. Glad I found this video because I have been posting on a pond forum and copped for some flack.
At last,straight to the point and great explanations of how it all works
ITS NICE TO HEAR SOMEONE EXPLAIN THAT --MOST PEOPLE ASSUME EVERYONE KNOWS WHAT THEY ARE TAKING ABOUT AND RATTLE THROUGH THERE EXPLANATION OF DRAINS & FILTERS
Thank you, hope it helped👍
Nice job mate, really made it clear how the gravity-fed filter & Pump-fed filters works
Thanks, great explanation & has helped me no end in planning what to do next week 👍🏻
Good sharing! I had a gravity fed bottom drain system for my Koi before.. the problem was that after about 2 years..gravel/leaves/sand settled at the bottom of the pipe and choked the whole system. I got a plumber to flush it out with pressure jets but was unable to clear the sediments completly. I got a handy man to seal my bottom drain and did a retro fit piping like yours but added slopes with concrete and have had no issues for the past 5 years.
this is the best explanation of how a system should work. Thanks so much for taking the time to make this vid. Cant wait to get started, gonna try tilapia to replace a large portion of my beef consumption.
Your illustrations is very helpful, greatly appreciate it.
Finally! An explanation that went to the point and easy to understand! Thanks a million. I'm planning on building my own, and was questioning every hour witch way to go. Cheers from Portugal
Thank you for your explanation, i've been searching a good presentation on how to install and process of bottom drain. God bless sir! Newbie here. 🙃
I hope i had seen this tutorial before I started my pond for my koi. Maybe next time of construction I will follow how this type of system works. Watching from the Philippines.
I have been scouring youtube for information like this. Great explanation on design and water flow logic. It will surely help me in building our small koi pond. Two thumbs up !!!
Exactly what I needed to be explained - and crystal clear. Thanks!
Looking to build my 1st pond, will be a sleeper koi pond and this video is perfect for the information I needed
Thank you for this ❤️
first person from where I really understood how it works! thank you very very much!
Brilliantly explained, I'm looking to upgrade and this helped explain a lot. Thanks!
I’m definitely going with the dedicated bottom drain. Thank you for the info :) I can’t wait to start digging.
nice and simple explanation, spot on
I've a similar pond to yourself, but currently have pump fed filtration with a canister feeding a DIY shower, the water quality visually isnt great although there is no ammonia or nitrites.
I'm glad that I can retro fit a bottom drain to my pond anyway!
cheers
aaron
Awesome! Thank you for the very detailed video. This helps me a lot.
Really helpful, I was about to go pump fed and will now redraw my plans. Better now the in 2 weeks time! :)
Thank you for thissss been confused about how this system works. Now i know thankssss
Great video Neil, very good explanation 👍
Thank you👍
hi, i didn't much understand how the water goes back to the pond but I've been looking for this video and thanks anyway
Great vid very helpful will now be looking to get a retrofit bottom drain 👍🏻
Goodluck, you will not look back👍
Check our the “Aqua Art” retro bottom drain marketed in the US.
They are the only one that I have seen that use a “side” connection and not a top one which allows the use of a 4 inch pipe which runs along the pond bottom, out of the fish’s way!
Not sure of shipping costs but am thinking of ordering one from the U.K.
Google:- aqua art retro bottom drain
Thanks for this video, I'm going to be changing to gravity next year cheers 👍
You wont look back. Goodluck 👍
@@neilryan9664 im new to your channel, thank you for explaining the two difference. Im planning on installing retro fit bottom drain. Initially i was going to use pressurised filter system and already purchased. But i have ppl saying the pressurised filters don't always do the job so I'm contemplating make diy gravity fed filter connected from retro fit bottom. My question is can i have both pressurised filter & gravity fed filter run simultaneously or is it too much? Thanks
Nice explanation. I'm about to improve on a 50m x 8m pond and also build another next to it. I'll be introducing catfish but the ponds are mainly for raising ducks. The fish will benefit but I also want to have health looking water as opposed to green murky water. May go with the retrofit idea on the existing pond but will go with the best solution for new pond. Haven't worked out how much water I'll need to shift per hour yet, size of pump and filter sizes yet!
Nice explanation, that’s how I have my koi fish pond bottom drain a gravity f system
Excellent video and explanation 👍
I like the retro fit version better. I feel like Heavy solids could settle in the original gravity feed drain and fill up over time.
My thoughts exactly and the retrofit would be far easier to flush/repair/replace.
well explained...thank you sir neil ryan....stay safe and god bless..
Great video it helped me a lot. I am making a pond type pool , 3 meters round and it will be 120cm deep with a walk in slop. I want it to look like a pond and it will have a waterfall above it. Its more for looks in the garden but on the hot days i want to walk into it to cool down, my question is do you think the slooing system you mentioned will work for me and waht type of pump do yiu recommend? 🤞🏾
Good man, you explained well 👌
Great video, thanks! Quick question - if you didn't want to put a hole in the pond wall, so no bulkhead, would it be possible to run the pipe up and over the pond wall?
Good informative video, well done.
Very good explanation, thank you.
This helps me, I bought a house with the pounds that's build with filtration you describing in the first picture. The pond is quite large so im not sure if I can conver it to your 3rd drowning example
Depending on what sort of fish you are keeping/wanting to keep it may be perfectly adequate
Great video. I'm trying to figure out flow rate and pipe sizes for over stocked pool? Is the whole idea to match the correct pipe size to pump size so there is no draw down in each chamber/barrel so you have a lower flow rate? Or in an over stock koi pond/pool would it be better to oversize my pump to have draw down in each chamber or barrel in my case. I was planning to have two retro fit bottom drain pipes going into my 1st 55 gallon static K1 barrel with both being 2"/50mm pipes, than into the 2nd 55 gallon static K1 barrel with a 3"/76mm pipe, then into my 3rd 55 gallon moving bed K1 barrel, then into my 4th 55 gallon moving bed K1 barrel then to a dry 3500 gph/13248 lph pump back to the pool water fall. I figure a ball valve/gate valve can be closed off before the pump to adjust the flow rate? Thanks all for any help asap.
I really will never understand how i managed to breed Koi 46 years ago without any of this stuff published on YT now.................
Very informative! Thanks
Really good explanation, thank you. Would the system you have installed work if the pond was below ground level but the filtration system sat above or will it only work if they are both level? I was looking at installing a pipe from the bottom drain up from 4ft out to the filter system, trying to work out the best way to do this. Cheers
That’s my exact same question. Did you ever figure it out ?
Thank you very much for your helpful video. I really like the gravity fed filter design together with the sloped floor fishpond. Do you think this system will also work well for fish farming? How much slope or pitch should the pond floor have? I appreciate it very much if you have time to respond.
It is something I have wanted to do,but am a little bit worried about whether it will suck the koi fry in to the filter. Is that likely to be a problem? By the way brilliant video explaining the system in way that's fool proof.
This is perfect! I am currently rebuilding my pond and this has explained / made me understand this a lot better. I have a couple of questions through, is it literally just gravity / water pressure that sends the water from the bottom drain into the filter? Does it matter where the filter is placed, for instance can it be higher than the pond or does it need to be the same height or lower? and is it worth fitting some sort of valve to stop water coming into the filter to carry out maintenance on the filter or would that just cause problems?
What about adding a skimmer connected to the suction line in order to improve filtration and skim the top part of the water.
Hi ...great information.....is it possible to put outlet from pond higher to the water level ...over half way up......cheers
can a bottom drain be installed when the pond is with pond liner?
Neil, thanks for putting this all into layman's terms! Out of interest, with the bottom drain scenario, where would one connect a skimmer or is the water from these not worth filtering and is usually just put back into the pond (possibly via jets to introduce movement)?
Skimmer depends again on gravity or pump system. It is definitely worth filtering. Filtering water from the bottom and top of the pond is ideal really. Some people run separate filters for the skimmer and some run it through the same system as the bottom drain
@@neilryan9664 Many thanks for taking the time to reply and for your advice. My skimmer will probably be gravity so I will whack the out-fall through the main filter. I assume I can just T into the main 4" line from the bottom drain to the filter?!
Are you able to give advice on Pump sizing...I am really confused what with “water in motion” calcs, the need to “power” a return jets to push the water round the pond and the large total water volume along with turnover recommendations for “healthy” water then add in the question of dry or submerged and my mind is blown! If you are able to help, I have inherited a pond that is completely buggered with a surface area of 90m2 and a water capacity of 86,000 Ltrs. First job will be to line it to stop the leaks!!!
Wow that's brilliant 👍👍👍
Will these gravity systems over flow if pump stops working you said you would explain great video thanks wayne
No, not if the filter is installed at the same level as the pond!
Think of it like a “spirit level”!
An easy way to demonstrate it if you are having trouble grasping the concept is to attach 2 funnels to a 1 meter length of hose, hold them vertically at the same level and get someone to fill one with water.
If held level both will have the same water level, if you raise one, water will overflow the other!
It’s exactly the same with a pond and filter system, the water will find “the level”!
@@ces69 thanks for the info great clear vids.
Saw your vid a bit late. Designed mine using the first one and every 3-4 weeks i have to get inside the pond to clean out the pump. quite the hassle.
If you increase your fish stocking density the fish themselves will agitate the water enough to allow flat bottom tank/ponds to self clean with bottom drain or solids lift. Just keep an eye out for nitrogen compounds and oxygen levels.
Wow beautiful
Hello Neil, How about improving further by placing a drain pipe at the bottom or at the side of your mechanical filter compartment for cleanup, will it be okay? I am about to build my own pond and came across your channel. Thank you.
Well said and awesome. If I go with retrofit type can I connect the pipe and climb up to the wall down to the chamber than to the pump to spillway? Do you think that will work? Or I really need to make a hole on the sidewall to make it work? Thank you so much.
If you go up and over the pond you will be above the water line. Keeping the outlet as low as possible will give you best pressure
@@neilryan9664 Thank you Ryan.
Great explanation thank you!
I want to build a waterfall, what about the filters not being on the same water level? will it work? I guess will need an extra pump to get the water all the way to the top of the waterfall
Will this work with a planted pond? I mean with a substrate?
Hi Neil, what size pipe is on your bottom drain? Is it 3 inch? That bulk head fitting can I get it for a 3 inch pipe and if so where can I buy one? Lovely pond by the way :O)
Cheers. It's a 50mm pipe. You can get bulk head fittings up to 4 inch. Check a plumbing supply centre👍
What is your solution or what would you recommend to clean as much muck as possible in the flat bottom pond?
Nice one
Maybe a silly question but a lot of in pond pumps say that they can’t be used for swim ponds due to the risk of electric shock. Dry run pumps that you sit 2m away and lower than the pond level seem to be more expensive compared to submerged pumps with the same L per hr capacity. So is it safe to put a submersible pump into the filter system fed by a bottom drain, as surely this water is a continuous route of electric conduction back to the pond? Thanks
If one cannot add a bulk head to the existing pond can you siphon the water from the water into the first filter chamber?
Neil, can you comment on the type of pump you would use in the 3rd container. I want to use a similar set up for a duck pond and want the pump set up after the mechanical filter due to excessive waste produced by ducks. I have a submersible pump but am not sure that will work.
Submersible is perfect. That's what I am using
bien explicado lleva toda la razon.
Hi, I have a question. I have a 5-ft deep pond and my filtration system is 2-ft higher than the pond. Does the gravity filter system works fine? I am still constructing it and it's near completion. Would love to know your thoughts.
I have the same question . Did you ever find out ?
@Maatson_ It indeed works! It's been my pond's setup for more than a year now.
@@bams8076 ok good to know
Thanks, so a question… with your sloping alternative, wouldn’t all the rotting leaves that sink down get drawn to the inlet at the bottom of the pond and how would you then clear this away from the mesh opening if it’s down there?
If falling leaves are a problem you should run a skimmer with a leaf basket. 4 inch pipes should handle most leaves but a skimmer would definitely help
sir in gravity fed system in 4 inch pipe at bottom the fish will go down the pipe also? tnx.
So can a pond have a bottom drain and a bog filter? Would that work?
I would still separate the solid waste independently or else you will have a build up of waste in your bog
How do you know what return pump you need?. Surely if your return pump pumps faster than your bottom drain flow you would empty your filter.
Correct. I am using a 5000 lph pump and have adequate water flow. The diameter of your pipes will determine how much flow you can run through the system. 100mm pipework will be enough for most pond pumps
Hi. How do you calculate the diameter of the retrofitted bottom drain? I have the problem with flow rates between the settlement chamber and the other two chamber. I have installed 4 50mm pipes coming from the pond into the settlement chamber already. Any help will be greatly appreciated.
what happen if the electricity is out? or brownout? Is it gonna overflow in the filtration chamber? please reply..
So the maintenance is basically you cleaning the sponges in the mechanical filtration?
Opening the valve on the vortex clears the heavy waste and usually once a week I will blast the brushes with a hose. I have a video on cleaning the filter if you are interested
how does distance and amount of pipe turns affect the system? or does it ?
My pond is round the corner to filters
question is there a easy way to set gravity filter water level to pond level .
richard
What happens when electricity goes off...will the bottom drain not overflow the filter system n empty the pond???
How does water travel from one chamber to the other? The chamber which has a pump will run dry within minutes.
Hello I am redoing my pond 14x16 " want to install bottom drain on a rubber liner what size drain should I use I have 5 Koi fish now but they are growing need to make bigger for them
Ty very nice
hi, is your filter same level as your pond?bcoz on your drawing it seem little higher..thanks
Nice system
Nice
Hello,
Just a question. With the bottom drain, how can we ensure that the waste of the fish dont get stuck on the pipe?
It is constantly in movement so it should never stick. Algae etc does occasionally build up in the pipes but it is very easy to purge by closing the bottom drain valve for a few minutes and opening it again
@@neilryan9664 Thanks, Neil.
Base from the drawing there is a 90° from the bottom drain and another 90° to the 1st chamber. I was just making sure that the waste wont sit on the pipe that is connected the elbows (90°)
Thank you
Question for you Neil if the pump is in the last chamber how do you get the suction power on youre pump through the pipe system
I wouldn't listen to this guy at all most of what he explains is bullshit made up crap, no one puts the pump in the last chamber cause like you said there will be no suction
Can I do a gravity fedd system to a bog filter then pump it back to the pond
best filter system is a pressurized bead system with a mechanical pre-filter. 1 koi per cubic foot lol
Omg - thank you!
Does silt not build up in the bottom of the four inch pipe?
No. It has a constant flow of water which prevents anything settling
Won't dirt get stuck in the pipe under?
No, because it is under constant flow. You can purge your drain pipes to free it from any algae etc that does manage to build up
Iv got a pond set into the ground. Iv fitted a bottom drain but the problem is I cant dig down far enough to sink my nexus 320 to be the same level as the pond water. Can I do a hybrid setup where my little sieve filter is gravity fed then put a pump after that to pump up to the nexus then have that overflow back into the pond?
You've probably done this already 6 months ago but yes it would definitely work and you don't even have to have the nexus above the pond only the internal outlet of the nexus then pipe it up over the pond wall and gravity will do the rest 👍
What will be the rate of flow of the water going down the bottom drain?
It's a 50mm pipe. With a couple of elbows etc, the gravity rate would be around 7500lph. Although that flow rate is dictated by pump size, I have a 5000lph pump👍
I have installed a bottom drain but my pump it’s espetinhos the filter quicker that it can be filled
I am a starter looking at starting, do you need any pumps in the tank at the bottom to suck the water up from tank to filter please ??
Look at his drawings, they show the different placement of pump for each type of system!
I’m not sure which bit you don’t understand, it’s pretty much self explanatory!
Where does the uv go on the first drawing ? Thanks
I like to keep my uv post filter but it really doesn't matter if you put it before or after the filtration
On a gravity feed system you will need to install it in the pumped “return” pipe work as it’s internal dimensions are too small to work on the filter inlet side!
On a pump fed system you would do the opposite, installing it in the pumped filter feed with the water returning to the pond by gravity!
So are you using 2 pumps or just 1?
Can the bottom of the pond be deeper that the filtration chaber?
Yes. Ideally that's what u want for adequate pressure.
👍👍👍👍👍