Improve the overall health of your fish with Freshwater Aquarium Salt. This all-natural salt is made from evaporated sea water and contains plenty of important electrolytes that will keep your fish in tip-top condition. Aquarium Salt also improves gill function so your fish can get the oxygen they need. This useful additive also improves recovery when used with medications, and can be used to hatch brine shrimp. Designed for all tropical fish and goldfish.