Blue Planet Snail Rid has been designed to specifically attack snails in freshwater aquariums. Snails will eat plants which cause problems for the enthusiast; however in large amounts snails create havoc to water quality. In some instances snails can degrade the entire eco-system of the aquarium. Snail Rid will kill all snail types; ensure no wanted snails are in the water. Snail Rid is toxic to fish in soft water conditions, it is not recommended as a product to use in these conditions, test and adjust water prior to using the product.