Evolution Aqua Pure Sludge Bomb rapidly breaks down pond sludge. 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, odour, and aesthetics. The bomb contains millions of beneficial bacteria and natural enzymes that rapidly and naturally breaks down, digests and removes sludge and organic waste. For best results: Maintain your pond water pH above 7 Check that your Chlorine level reads 0 Perform 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 winter. Regular use will help to prevent excessive sludge build up and reduce filter maintenance. Specifications 1 Bomb Treats: Up to 20,000L (4,400 gallons) Available Quantities: 1, 2, 3 & 6 Packs Safe for all ornamental fishponds You cannot overdose your pond