Evolution Aqua Pure Pond Bomb is a fast acting, intensive pond treatment which, with its friendly bacteria and enzymes, clean up organic waste and break down ammonia and nitrate, leaving the pond crystal clear. This concentrated version of Pure Pond can be put into the filter or straight into the pond, and is ideal for use in ornamental ponds, koi ponds, water features or ponds which do not have conventional filtration. Each single Pond Bomb treats any sized pond up to 20,000 litres. Treatment can be repeated as required.