Pond Balance 1 x 200g. Blanketweed is a problem that affects most ponds (particularly those which are UV filtered). The rapid growth filamentous stringy algae can spoil the appearance of the pond. It will also clog pumps and filtration equipment. Pond Balance is a unique non-algicide ‘plant friendly’ formula ensuring that no harm comes to any other pond plants, fish, filtration bacteria or water using wildlife. Pond balance does not effect plants – it also contains plant stimulants and so helps establish a naturally balanced pond. Treats 6,819 litres (1,500 galls)