Instant Ocean is a complete formula that includes every necessary major, minor and trace elements blended to simulate natural seawater. Only Instant Ocean gives you every nutrient necessary for marine organisms growth and development. the new, improved formula is even faster dissolving than ever. Mix Instant Ocean salt with ordinary dechlorinated water because water conditions at different tlocations vary tremendously, we recommend using a commercial dechlorinator (like Ammex) to completely neutralise any concentrations of chlorine and/or chloramine. Stir vidorously to mix salt and water. Although the solution of Instant Ocean premium sea salt can be used immediately, we suggest aerating the water until it reaches oxygen / carbon dioxide equilibrium Use an accurate hydrometer to adjust salinity, recommended specfic range 1.02. to 1.023 at 75F.If secific gravity is too low, add more Instant Ocean Salt, if too high add more dechlorinated water. Tightly reseal inner protective bag to keep out moisture and store in a cool dark place. Remember:- Never mix salt in an aquarium containing animals. In new aquariums, transfer animals to the aquarium after salt is completely mixed and areated and specific gravity is adjusted correctly A 25% change of aquarium water done on a monthly basis, is recommended to maintain water quality To prepare small quantities of Instant Ocaen Salt, use 1/2 cup of Instant Ocean Salt for each Gallon of water. The best selling salt in the world. The synthetic salt of choice of nearly every U.K. public aquarium, including: Bristol, Blue Planet, Chester Zoo, Horiman Museum, Leeds Botanical Gardens & Tropical World, London Aquarium, London Zoo (Web Of Life), SeaLife Centre (Southend-on-Sea) and Seaquarium.