SeaKlear Chitosan Clarifiernaturally clarifies cloudy water with easy, weekly application. This product is safe to use with all sanitizers. It removes excess oils and lotions to prevent scum at the water line. ChitosanClarifier is just that: all natural. There are no thickeners added and it is environmentally safe and will not harm plants or animals. The unique molecular shape and electrical charge of this product allows it to entrap and aggregate heavy metal particles, including manganese, copper, and iron, which have come out of solution. It also improves filtration in the pool.