Fish health: Adds beneficial electrolytes to the water and reduces stress in pet. - High quality salt: Enhance the health and well-being of your aquatic pets with Tetra Aquarium Salt. - For Freshwater fish and goldfish: specially formulated for freshwater tanks, including tropical and goldfish aquariums. For aquarium use only. - Monthly Maintenance: it safely cleans aquariums and accessories, conditions water, buffers nitrite levels and recharge aquarium water softener units.