Aquarium salt is a type of salt that is used in the aquarium hobby to promote the health of fish. It is made from evaporated sea salt and contains essential electrolytes that fish need to reach peak coloration and vitality. Aquarium salt helps osmoregulation of freshwater fish, which is the physiological process fish use to control the amount of salt and water in their bodies. It also keeps the slime coat of freshwater fish robust and healthy, promotes healthy gill function, reduces stress, and helps wounds heal. Aquarium salt is used to prevent disease and other health issues, and it can be added to the aquarium water in low dosages regularly to maintain the fishs health. Aquarium salt should be used sparingly to treat fish only if there are pathogens, parasites, or microorganisms causing stress to the fish. It should be added to the aquarium water after dissolving it thoroughly in part of the water and slowly adding it, waiting for the solution to be evenly distributed over the entire tank. The recommended dosage is one tablespoon per 5 gallons of water. Aquarium salt does not evaporate or get filtered out, so it remains in the tank until a partial water change is performed.