Foamclear is designed to break down the froth in garden ponds, created by an excessive build up of protein in the pond water. The more protein that is present the larger the amount of foam. Foamclear will breakdown the froth, allowing carbon dioxide to escape from the water and helping to maintain the correct pH. Foamclear is non toxic, harmless to plants, harmless to all fish and other aquatic life and does not affect bacterial filters. 250 ml treats 4550 litres (1000 gallons)