For Canister Filter 104,204,304,404,105,205,305,405,106,206,306,406 Compatible
For Canister Filter 1-gallon tank with 10 feeder guppies (tiny to normal). Decompose and absorb Our Generic Compatible Carbon Filter Pad (black). Replace Bio-Foam/Polishing Pad/BioMax/Carbon/Zeo-Carb Filter.