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 bl