Instant Ocean Sea Salt is the most carefully formulated and universally preferred sea salt in the world. The #1 choice of hobbyists, public aquariums, and scientific research facilities, Instant Ocean Sea Salt has set the industry for quality, consistency, and value for more than 40 years. Instant Ocean Sea Salt contains every necessary major, minor, and trace element and has no nitrates and no phosphates. It was developed through sophisticated biological and chemical testing, and every batch is analyzed to assure consistent high quality. Also available in sizes: 25 gal, 50 gal, 160 gal pail and 200 gal Royal Item Number: AIOSS10