I have done the math!!! and it works, because of how big I made it...both tubes are filled with charcoal and my fish absolutely love it!! and so do my fry!!! I got the design from a local friend and long time fish keeper, and he did the Water tests and all levels are perfect for my FH, RT and fry!!!knifegill;4467775;4467775 said:Wait, more on the charcoal. That's a new one to me. You're sure that the stuff will take all the chloramine, chlorine and metals out of your tap water for many years? How do you test it to be sure it's still working? Doing the math, this would be cheaper than the amount of Prime I use. If I can trust it.
Any way you could post what materials are needed as well as a picture of the charcoal unit for those of us interested in building our own?cjbarth;4467804; said:I have done the math!!! and it works, because of how big I made it...both tubes are filled with charcoal and my fish absolutely love it!! and so do my fry!!! I got the design from a local friend and long time fish keeper, and he did the Water tests and all levels are perfect for my FH, RT and fry!!!