We offer calcium carbonate as below:
Calcium carboante(powder&granule) from mineral USP28 LOW LEAD<0. 25 PPM by ICP-MS
Biological calcium carboante(powder&granule) from oyster CP2000
Coral calcium from coral. CP2000
Also we offer as:
Calcium active from oyster CP2000
Magnesium carbonate;
Potassium carbonate;