eSHa Gastropex - Against Bacterial Slime Disease. eSHa Gastropex effectively combats aquatic snails in your aquarium. Use Gastropex to stop snails destroying aquatic plants and transmitting disease to your fish. Can be used as a preventative bath for new plants this prevents snail colonisation and the runaway growth of micro-organisms. - Destroys all aquatic snails. - Safe to use with fish and plants. - Clears cloudy water (bacterial Blooms) and combats Hydra. - Usually no extra water change required after use. - Suitable for tropical feshwater and coldwater aquaria. 10ml treats a maximum of 500 litres (110 gallons) of aquarium water.