Is a water conditioner for fresh and salt water aquariums, and necessary to neutralise the chlorine from tap water, to reduce the heavy metal polluting effects of chemicals in the tap water and to prepare the water for your fish. It is enhanced with ALOE VERA a special natural colloid which protects the surface and gills of fish. AQUASANA must be used immediately after filling your new aquarium and when water is partially replaced as it maintains the pH level stable and is an ideal and efficient anti-stress.