A high concentrated powder that delivers millions of beneficial bacteria for the fast start-up of a new biological filter or to give a boost to an existing filtration system. It improves water quality and clarity, seeds biological filters, prevents algae growth and assists in the biological balance of ponds, lakes and aquaria. Rapidly disposes of nutrients such as fish waste, uneaten food, rotting vegetation and ammonia and nitrite. Designed to help you get the best out of your pond or water feature.