Blagdon Green Away is a great short-term solution to green water in your garden pond. Quick and easy to use Green Away works by making the suspended green algae particles clump together to form larger, denser particles that will sink to the bottom of your pond. It is important to remove these larger particles from the bottom of your pond. The particles will now be larger enough to be removed by a pond filter. Or for an easy solution, use a sludge treatment to clear the sediment away - such as Blagdon Sludge BusterGreen Away is not an algicide, so does not pose a threat to your pond\'s ecological system. It is harmless to filters, all species of pond fish, plants and water using wildlife. Easy dose bottle - designed to easily measure 25ml doses. Each 25ml dose will treat 1136.5 litres (250 gallons) of water. Dosage: 250ml of Green Away will treat 11365 litres of water. 1 litre of Green Away will treat 45460 litres of water. 5 litres of Green Away will treat 227500 litres of water.