SuperFish AquaFlow Crystal Clear Cartridge SuperFish AquaFlow Crystal Clear Cartridge – For even better results you can replace the cartridges with Crystal Clear cartridges. A dual-action cartridge to promote crystal clear water and less algae, the SuperFish Aqua Flow Crystal Clear Filter Cartridge consists of unique filter media with a 100% open structure filter foam. It consists of filter foam and Crystal Clear, a combination of SuperFish Activated Carbon and Zeolite. It then removes all coloration and ammonia from the water and also helps to prevent Nitrate and Phosphates. The result is crystal clear healthy water with less algae growth. Cartridges available: 50 (3pcs) 100 (2pcs) 200/300 (1pc) 400 (1pc) We also recommend that you replace your cartridge once a month. Remove the cartridge before administering medicines or chemicals, otherwise they will then be absorbed as well. SuperFish surely makes your aquarium hobby successful, complete with aquariums, filters and filter media, heating, lighting, ventilation and useful accessories. It is our goal to make your aquarium hobby successful and also affordable. Click here to also browse a wide range of SuperFish products we stock!