The Fauna Marin Elementals Trace Vanadium (V) is a highly concentrated solution designed to replenish vanadium in saltwater reef aquariums, ensuring optimal water chemistry for the health of marine life. This product contains high-purity organic and inorganic vanadium salts along with stabilizers that prevent degradation during storage. Recommended dosing is 1 ml per 100 liters (26 US gallons) to add approximately 5 micrograms of vanadium per liter, but it's crucial not to exceed an increase of more than 2 micrograms per day per gallon to avoid any risk to corals.