Dechlorinator making tapwater safe for tropical seawater, brackishwater, freshwater and coldwater aquarium fish. Nutrafin Plus works fast to neutralise chlorine, chloramine, fluorine and other toxins present in tap-water which are damaging to fishes, invertebrates and plants. The special formula also reduces stress in your fish, reinforcing the body's protective mucus (helping to prevent disease) and improve tissue growth after an infection. Nutrafin Plus should be used when initially filling your aquaria and when carrying out subsequent water changes. Always read instructions fully before use. - Dechlorinator. - Water conditioner. - Binds heavy metals. - Naturally coats and protects fish's gills and body.