Orb-3 F839-000-55G 55 gal Pool Enzymes conditions water to naturally purge itself of body oils, lotions, cosmetics, urine, and other organic materials, leaving pools crystal clear and odorless. It is compatible with whatever chemical treatments you might use and reduces the need for using excessive amounts of chemicals. It helps stabilize pH levels, avoid water upsets, retards the growth of slime and algae, and is effective on scum lines.