Evolution Aqua Pure Pond Bomb is a fast acting, concentrated version of the The Award Winning Pure Pond. Pure Pond Bomb is ideal for use in Koi ponds, ornamental ponds, self contained water features or ponds which do not have conventional filtration, to achieve crystal clear, healthy water. One Bomb will treat upto 20,000 litres - you cannot overdose your pond with Pure Pond Bomb.Do you need an intensive, fast acting pond treatment? Do you need help achieving crystal clear, healthy water? If yes, Evolution Aqua?s PURE Pond Bomb is the product for you.Inside the Pure Pond Bomb there is a unique combination of friendly bacteria and enzymes, which get to work as soon as the ball hits the water to clean up organic waste and break down the ammonia and nitrite to leave your pond crystal clear and healthy.Simply drop the Pure Pond Bomb into your pond filter or directly into the water. Pure Pond Bomb can also be used when starting up a new filter, as the high concentration of bacteria will help to remove the harmful ammonia and nitrite, allowing the filter media to mature. Just drop the Pure Pond Bomb into the biological stage of your filter. Pure Pond Bomb is safe for all fish ponds. One pack contains one ball, enough to treat upto 20,000 litres - this bomb packs a powerful punch!