Calcium Carbonate - Calcite
Active Ingredients: Calcium Carbonate (Limestone). Bound by gelaltin (porcine).
Place in HOB filter to dissolve over time, raising your tank's general hardness or carbonate hardness (GH and KH).
It's recommended to use these along with a GH/KH kit to ensure your tank remains within stable parameters.
For anyone restricted from using porcine derivatives, email email@example.com for non-porcine derived options. A custom invoice can be created for you.