Swamp Treat will eliminate algae in any type of pool in 24 hours or less! Swamp Treat is the most powerful formula on the market, guaranteed to clean the worst algae blooms, fast! Your pool will go from a green swamp to blue in as little as a few hours. As the filtration system kicks in, Swamp Treat accelerates your chlorine's ability to fight algae blooms and the pool will clear. A 1 lb. bottle will treat 20,000 gallons, and do in one treatment what other products take multiple times to do - and do it faster. The non-toxic formula does not contain any metals, will not stain your pool or affect water balance. NOTE: Be sure to pre-dissolve the chlorine and broadcast the solution on top of the pool, don't pour it down the sides.