Blagdon pond balance blanketweed treatment is an award winning non algicide treatmentr the plant friendly formula ensures that no harm comes to any other pond plants fish filtration bacteria or water using wildlifer pond balance does not effect plants because it works by making unavailable a nutrient that is only required by filamentous algae and thus literally starves it out of existencer pond balance contains plant stimulants and so helps establish a naturally balanced pondr small 205g