The Fritz ProAquatics Reef Pro Mix Redline Complete Aquarium Sea Salt contains all of the major and minor elements found in sea water， so you can easily create an ideal environment for your aquatic pets. This mixture features high-quality ingredients like enhanced calcium， magnesium and potassium to promote a safe and healthy aquarium. It’s free of nitrates， phosphate， ammonia and other bad stuff. It boosts buffer levels by quickly balancing your tank’s pH.