Piwerod EZ-Change #2 Aquarium Filter Cartridge - Compatible with Aqua-Tech 10-20 Aquarium Filter - 12 PCS Fish Tank Filter Cartridges Compatible with AquaTeach 10-20 Power FilterBrand: Piwerod Features: EZ Change #2 Aquarium Filter CartridgeThe filter cartridges are compatible with Aqua Tech EZ Change # 2 Aquarium Filter, fit for 10 20 power filters. Strong Adsorption Activated CarbonEach fish tank filter cartridges contains a lot of high quality activated carbon, which can effectively capture fine particles or dust in the water, removes the odors, water discoloration and impurities and provides fresh water for the fish. High