AquaClear Filter 20, 30, 50, 70 & 110 replacement Activated Carbon, BioMax & Insert Foam Blocks, Activated Carbon, Intake Strainer Sponge, Bio-Foam, Zeo-Carb and Ammonia Remover. Media also fits AquaClear 150, 200, 300 & 500. AquaClear recommends you replace the AquaClear Activated Carbon Media monthly, replace the AquaClear Bio-Foam Media every two months, and the AquaClear Bio-Max media every three months. Related Products: AquaClear Aquarium Filter Parts I AquaClear Aquarium Power Filters. Useful Links: AquaClear Power Filter Instruction Manual (old version) I AquaClear AC20/AC30/AC50AC/70 Power Filter Instruction User Manual I AquaClear AC110 Power Filter Instruction User Manual