The ESV B-Ionic Magnesium supplement in a 1 gal jar offers a convenient one-component liquid solution designed to complement the B-Ionic Calcium Buffer System or Calcium Hydroxide (kalkwasser powder) in marine aquariums. By utilizing the process of "ion-pairing," this magnesium supplement helps maintain the ionic balance necessary for the health of closed marine environments. Magnesium ion concentration plays a crucial role in influencing the saturation point for calcium carbonate in solution, aiding in the support of calcifying organisms. Free from nitrates, phosphates, organics, or chelating agents, B-Ionic Magnesium ensures purity and compatibility with marine ecosystems.