For small to medium aquariums. Creates crystal-clear water. Safe for aquatic plants. Clears cloudy water. Reef recommended. Clears Green Water. Algone protects and enhances bio-availability of trace elements assimilates organic and in-organic pollutants and toxins energizes microbial activity corrects nutrient imbalances breaks down carbohydrates protein fat and other water pollutants and restores the chemical and biological balance of the aquarium. Safe for fish plants algae eaters snails coral live rock polyps invertebrates etc. Algone enhances the environment of oxidizing (nitrifying) bacteria and promotes a higher dissolved oxygen content in the aquarium. Contains 6 pouches Treats 330 gallons. Use in tanks 5 - 125 gallons and up.