I'm not a new member but have a new tank so lets go with that. The tank is a drilled 12"cube that I'm using the over flow to feed the canister filter . I know it is not a good source of filtration but I'm willing to put in the work to keep it as clean as possible . My question comes down to what is the best type of media to put in the canister . I'm thinking sponge filter or filter floss to buffer the large particles and chemi pure elite just because it's the best stuff ever invented. Other than that i can only think of fosban but it wouldn't tumble in there so I'm noy sure it would help. any other suggestions ???