Difference between Chlorine Demand and Residual Chlorine

[@wateracademy5866]

Water treatment for beginners course: bit.ly/43vbJdF
Wastewater treatment for on-site projects course: bit.ly/44PkIHB

[@khondokerazizulhaque357]

Superb awesome fantastic
From CALCUTTA

[@wateracademy5866]

Thanks

[@theeagle3741]

Good explanation and your tongue twist of English speaking is soothing.👍

[@exceptionalengineering2676]

Thank you,we known more from you 💓

[@michaelleirvag1905]

do residual chlorine test kits include both combined and free chlorine

[@michaelleirvag1905]

does residual chlorine include both combined and free chlorine?