1 kg

Aragonite sand is perhaps the most commonly recommended sand in the saltwater aquarium hobby. It is generally available as a fine grain product that “looks” like the prototypical sand. What makes aragonite sand so commonly used in the aquarium hobby is that it is made from the same stuff that coral skeletons are made of…calcium carbonate. In fact, the term aragonite sand is really just a fancy way to state…sand composed of calcium carbonate.