It basically has carbon in it with a cartridge filter over this and then a foam sleeve. It is capably of handling a 55 gallon freshwater tank and I have a 36 gallon tank. I thought that I read somewhere that said that carbon wasn't good for bio-spira but perhaps I just read it wrong. I tried to find some info on how I should use the bio-spira in a tank that is, well, messed up like mine but couldn't.
This is adequate thought isn't it. I don't really have a bio-wheel or anything like that. I just have that magnum 350 canister filter, aerators, a heater, no live plants, and your common looking rocks on the bottom of the tank. Thank you for the help.
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