You don't really need it unless you are removing medication from the tank.gabagool;2858658; said:I am running two AC70's on my 55, and the water is crystal clear. I am curious what people use in the filter when they say that they dont need to replace anything? I rinse out the sponge whenever it is needed, and I do not replace the biomax, but what about the carbon? Is it not needed? or can it be rinsed?
Ditch the carbon and add another biomax. That or you could ditch the carbon and add some filter floss, I find that gives me crystal clear water.