The ESV B-Ionic Magnesium supplement is available in a convenient 5-gal pail size, making it ideal for marine aquarists seeking to maintain optimal magnesium levels in their closed systems. This simple, one-component liquid supplement seamlessly integrates with the B-Ionic Calcium Buffer System or Calcium Hydroxide (kalkwasser powder) without disturbing the ionic balance of the aquarium. By leveraging the chemical process of "ion-pairing," the magnesium ion concentration plays a crucial role in influencing the saturation point for calcium carbonate in solution. Free from nitrates, phosphates, organics, or chelating agents, B-Ionic Magnesium ensures purity and effectiveness in marine aquarium applications.