Gastropex effectively combats aquatic snails in your aquarium. Use GASTROPEX to stop snails destroying aquatic plants and transmitting disease to your fish. • Destroys all aquatic snails. • Safe to use with fish and plants. • Clears cloudy water (bacterial Blooms) and combats Hydra. • No extra water change required after use. • Treats Tropical / Coldwater up to 500 litres / 130 US gallons / 110 UK gallons. GASTROPEX can be used as a preventative bath for new plants. This prevents snail colonization and the runaway growth of micro-organisms.