Excessive sludge build up can cause imbalances in the pond ecosystem leading to several issues such as algae blooms, reduced water quality, reduced oxygen levels, odor and aesthetics. Pure Sludge Bomb contains millions of beneficial bacteria and natural enzymes that rapidly break down and digest sludge and organic waste. Contains activating gel for better performance. Cleans up organic waste and digests sludgeReduces pond and filter maintenanceHelps to convert ammonia and nitriteCreates a more oxygen-rich pond environment Simply drop the PURE Sludge Bomb with the activating gel directly into your pond or filter. For best results: Maintain your pond water pH above 7Check that your Chlorine level reads 0Perform regular water changes When to use: Use PURE Sludge Bomb during spring when the pond comes to life and during Autumn to help the pond be ready for the winter. Regular use will help to prevent excessive sludge build up and reduce filter maintenance.