Database is difficult because there is more to growth than just light. Water chemistry, water clarity, spectrum, measurement location, reef maturity (shadows, spot light), and so forth. Never the less thanks for the time making these and keep up the good work.
From R2R post - Jan 2021: PAR in open water at 0m is like 1800 (as we generally measure this in the reef hobby) on a presumably clear day around noontime. It goes down to 600 PAR at 10m, and only gets to 300 (something many people recommend as a "high amount of light) at around 30m. (which is already quite deep. You'll start seeing relatively few photosynthetyic corals by this depth) - PAR at even 40m at this site (Aqaba, Jordan - I presume with very clear water, much like the Kona Coast or places like Osprey Reef in the Coral Sea where there's been a lot of "mesophotic reef" research) is still around 150. (this is actually what I'm most interested: how to roughly capture a certain form of reef ecosystem in the aquarium. In this case, if I wanted a "mesophotic biotope" with the cnidarians you might find at such sites at 40m - e.g. acropora enchinata, granulosa, carduus, BTAs - I might want to keep PAR at no less than 150 for at least a few hours a day. Assuming that the specimens I get from, say, ORA can actually be adapted to thrive in such light levels, which is a completely separate question. - BTAs can be found in areas that have from 50-700 PAR at noontime in the wild - ergo, the amount of PAR that most hobbyists strive for in our tanks is actually not that much compared to a wild reef in ideal clear light conditions. (I won't go into the question of "should we seek 1000 PAR for, say, Acropora millepora, and how long we should do so", because I think that question is basically settled by practical experience)
Might not make a difference except when first introducing corals. How many corals grow in small lagoons under direct sunlight? Some even come to surface. Other corals are 30-50-70 feet down. Though the heaviest coral growths we often see when diving are “islands” or corals at 10-20 feet, where the largest clusters usually occur. We don’t have anything like that with our aquariums.
I wish there was a mini par meter that was affordable for everyone to buy and use because it’s so important. I’m surprised we don’t have one on the market by now
@Botzz28 That will never happen. The parts used in them alone will never get them below the 150 mark and there chinese meters at that 150 mark. Thats likes saying "I want my $1 ph probes"
@@rollandklontz just went to reefapalooza and came home with 0. The prices from these vendors are absolutely out on control. Anything that’s decent looking is like 600$-1000$. These people are crazy and it’s going to just kill this hobby. What a shame.
@Botzz28 I have been in this hobby for close to 30yrs and the prices today fro drygoods are the cheapest they have ever been. The price of corals have gone up abit for some and most of the fish prices have remained unchanged with some being even cheaper thanks to aquaculture.
Par is not the most important. With everyone using leds. Spectrum is key. You can change the Blues the UV white. But guess what. What Spectrum are you at with the adjustment you made. You don't know. Par doesn't give you this. Spectrum is key for growth. You can have growth with the wrong Spectrum but your corals are not getting the right light they need. Witch can lead to stn or rtn from health. Just like unstable parameters. Light falls under this to.
Database is difficult because there is more to growth than just light. Water chemistry, water clarity, spectrum, measurement location, reef maturity (shadows, spot light), and so forth. Never the less thanks for the time making these and keep up the good work.
Mark/ Fritz is in the building 🎉🎉👏👏👏Now I have something worth watching
Good discussion I am testing my radions g6 with a par meter and realized 2 Xr15 are not enough for my 150 g tank
Always love your vids!
From R2R post - Jan 2021:
PAR in open water at 0m is like 1800 (as we generally measure this in the reef hobby) on a presumably clear day around noontime. It goes down to 600 PAR at 10m, and only gets to 300 (something many people recommend as a "high amount of light) at around 30m. (which is already quite deep. You'll start seeing relatively few photosynthetyic corals by this depth)
- PAR at even 40m at this site (Aqaba, Jordan - I presume with very clear water, much like the Kona Coast or places like Osprey Reef in the Coral Sea where there's been a lot of "mesophotic reef" research) is still around 150.
(this is actually what I'm most interested: how to roughly capture a certain form of reef ecosystem in the aquarium. In this case, if I wanted a "mesophotic biotope" with the cnidarians you might find at such sites at 40m - e.g. acropora enchinata, granulosa, carduus, BTAs - I might want to keep PAR at no less than 150 for at least a few hours a day. Assuming that the specimens I get from, say, ORA can actually be adapted to thrive in such light levels, which is a completely separate question.
- BTAs can be found in areas that have from 50-700 PAR at noontime in the wild
- ergo, the amount of PAR that most hobbyists strive for in our tanks is actually not that much compared to a wild reef in ideal clear light conditions. (I won't go into the question of "should we seek 1000 PAR for, say, Acropora millepora, and how long we should do so", because I think that question is basically settled by practical experience)
At what percentage are you running yours lights for those readings? Ok 80 percent got it😊
Might not make a difference except when first introducing corals.
How many corals grow in small lagoons under direct sunlight?
Some even come to surface.
Other corals are 30-50-70 feet down.
Though the heaviest coral growths we often see when diving are “islands” or corals at 10-20 feet, where the largest clusters usually occur.
We don’t have anything like that with our aquariums.
What par model number are you using?
I wish there was a mini par meter that was affordable for everyone to buy and use because it’s so important. I’m surprised we don’t have one on the market by now
Depends on what you call affordable. Apogee has one that plugs into your laptop or desktop for $250-280.
@@rollandklontz We should have a < 50$ par meter by now.
@Botzz28 That will never happen.
The parts used in them alone will never get them below the 150 mark and there chinese meters at that 150 mark.
Thats likes saying "I want my $1 ph probes"
@@rollandklontz just went to reefapalooza and came home with 0. The prices from these vendors are absolutely out on control. Anything that’s decent looking is like 600$-1000$. These people are crazy and it’s going to just kill this hobby. What a shame.
@Botzz28 I have been in this hobby for close to 30yrs and the prices today fro drygoods are the cheapest they have ever been. The price of corals have gone up abit for some and most of the fish prices have remained unchanged with some being even cheaper thanks to aquaculture.
Databases would be great.
So 600-1000 par would be where most corals naturally grow. 600 at 10m/35ft, growth of coral in the oceans generally decreases in density and species.
Micromole?
Par is not the most important. With everyone using leds. Spectrum is key. You can change the Blues the UV white. But guess what. What Spectrum are you at with the adjustment you made. You don't know. Par doesn't give you this. Spectrum is key for growth. You can have growth with the wrong Spectrum but your corals are not getting the right light they need. Witch can lead to stn or rtn from health. Just like unstable parameters. Light falls under this to.