A DIY Larvicide that provide up to 150 days control. The active ingredient is S-Methoprene an IGR which is very safe for aquatics pets and human. Suitable for catch basins ponds lakes roadside ditches and surface water receptacles are all locations where ongoing maintenance is necessary but often impractical. A single application of ALTOSID 150-Day Briquets provides the solution by ensuring consistent slow-release control for up to 150 days. LABELLED FOR GENERAL USE.Active Ingredient: S-Methoprene