BioGuard SoftSwim A is a highly effective algaecide that provides broad-spectrum protection against algae. As the first step in the SoftSwim program, SoftSwim A acts as a crucial defense against algae growth, inhibiting and controlling it. With its unique formulation, SoftSwim A withstands evaporation from direct sunlight and works harder in high temperatures, making it an ideal algaecide for warm-weather climates. Its use on a regular basis also supports the effectiveness of other SoftSwim products. SoftSwim A can be used weekly or every two weeks to keep your pool crystal clear and algae-free.