PoolBoss Formula 500 Algecide - 32 fl. oz.

Formula 500 is a superior, uniquely blended product which is highly effective in controlling the growth of fungi, greenish free-floating varieties of algae, and the so-called black algae. Formula 500 will not foam, react with chlorine or interfere with the efficient operation of sand, diatamaceous earth or cartridge filters. Formula 500 is effective at any pH level, reduces the chlorine demand of a pool and contains no copper which can stain pool walls.