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 Crystal Clear Water Key Features: Water Clarifier Traps Floating Particles Safe For All Aquarium Inhabitants For Freshwater