Coral sand

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What is it?[edit]

Coral sand.jpg

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).

What is it used for?[edit]

  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.[1] Typically to buffer soft water and to raise pH.

How much to use?[edit]

Approximately 1 handful per 10 Litres (2.6US G.) spread over the substrate.