Fluval Quick Clear Cloudy Water Treatment. Fluval Quick Clear effectively helps eliminate undesirable particles that cause cloudy aquarium water, such as suspended organic and inorganic particles, dirt, slit and fine sand. Its special formulation clumps together particulate waste by ionic attraction, vastly enhancing filtration absorption and creating clear water as a result. Clears cloudy aquarium water Traps floating particles – organic and inorganic particles, dirt, silt, fine sand, etc. Fast-acting and safe for all aquarium inhabitants Enhances filtration absorption to produce clear water For use in freshwater aquariums 4 fl oz / 120 ml bottle treats aquariums up to 480 US Gal / 1816 L Available Size: 4 fl oz (120 mL)