A+ Aquarium Salt is an all-natural sodium chloride formula that supplies the electrolytes freshwater fish rely on to take up oxygen and release carbon dioxide and ammonia through their gills. Without electrolytes, fish are more prone to stress-related illness.

This salt is used to condition new tanks and water changes, promote recovery from disease, and treat minor issues like constipation and mild swim bladder trouble. It can also be used at a higher concentration for a short parasite bath in a quarantine tank.

This 1 pound bag treats water at a rate of one tablespoon per 5 gallons for community and goldfish tanks. Because salt does not evaporate or filter out, only add more with each water change, and use caution around salt-sensitive live plants.