Coral sand

What is it?
Coral sand is a mostly white medium fine crushed coral and shells (though sometimes Aragonite is added). The shells of freshwater or marine invertebrates is made of [Limestone], the mineral calcite (calcium carbonate CaCO3).


 * Designed to slowly add calcium and carbonate to the water.

What is it used for?

 * 1) To make a substrate for an aquarium tank.
 * 2) To add calcium to the water to increase the GH levels.
 * 3) To add carbonate to the water to increase the KH levels. Typically to buffer soft water and to raise pH.

How much to use?
Approximately 1 handful per spread over the substrate.

Links

 * Coral Sand
 * Limestone