No need to scrub, backwash or worry with this powerful, multi-grime eliminator. Big Shot is a highly effective natural enzyme infused with an organic clarifier that quickly clears cloudy water and helps your pool's filtration system run more efficiently. This enzyme buster helps remove dead algae debris, cosmetics, suntan lotions, allergens such as pollen, and even helps clear your plumbing of antifreeze residue from winter's cold wrath. With less oil and greasy buildup, your pool's filter can do more while working less; greatly increasing your filter's lifespan. This product is compatible with Cartridge, DE, and Sand filters.