Evolution Aqua Blanketweed is the 100% organic solution for blanket weed. Evolution Aqua Blanketweed is 100% fish, plant and wildlife risk-free and using it won't negatively affect any beneficial bacteria or biological filters. It can be used in any ornamental ponds or closed bodies of freshwater and UV clarifiers do not need to be turned off when using it. - 100% natural blanketweed solution - Fast performing and reliable - Fish, plant and wildlife harmless - Obvious results within days - Obtainable in 400g, 800g, 2kg and 4kg