Fluval Clearmax brings a lot of benefits to your aquarium. It clears out many of the compounds that promote the growth of unsightly algae and absorbs phosphate nitrites and nitrates. As a result your maintenance becomes much easier. Also this product makes your aquarium water crystal clear reduces aquarium odor resulting and promoting in a healthy environment for your fish to enjoy. Fluval Clearmax works in both saltwater and freshwater environments. Ensure that you rinse this product before use. Use a 100g package to treat 100l of water for up to three months.For filter models: 106 206 306 406 FX5 105 205 305 405 104 204 304 404.