This product is designed to increase magnesium and correct ionic imbalances in your marine aquarium. Reef aquariums with high alkalinity and calcium demands maay need to correct ionic imbalances. Thrive"s magnesium is formulated at 123,421 mg/kg, which is a saturated solution of magnesium chloride and magnesium sulfate. This means you won"t find this blend of Magnesium in a higher concentration.