Baquacil Swimming Pool Sanitizer & Algistat is a chlorine-free polymeric sanitizer that is effective against a wide variety of microorganisms. Because it forms insoluble complexes with pool contaminants, Baquacil Sanitizer & Algistat works in conjunction with the filter to physically remove impurities from the water as it sanitizes. Unlike chlorine and bromine based sanitizerrs, the Baquacil Sanitizer & Algistat is not affected by sunlight, water temperature, or pH fluctuations. This stability allows a pool to be properly maintained for longer periods, generally 7-14 days depending on consumption patterns, before additional Baquacil Sanitizer & Algistat is required. This provides more consistent bacteria control and greater ease of operation. Pool owners should check the level of Baquacil Sanitizer & Algistat weekly using Baquacil Test Strips and top up when necessary.