waterdrop
Enthusiastic "Re-Beginner"
Well you don't want to cram the media in so tightly that the water wouldn't be able to flow through it properly. At the end of medication you'll be forced to take out -something- (perhaps the least mature sponge, the one you are putting in right now, late in the game.) And you'll put back in your existing carbon to clear out the meds. The carbon will be active doing that for 3 days, then you'll want to replace it with -another- carbon cartridge/bag and run that for another 3 days and then toss that one in the trash too. After all that you'll put your sponge back in (you could float it in the tank meanwhile and some of the bacteria might persist.)
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