Calcium carbonate 900gm Chalk Powder (Used for PH balance)
 
Don't Confuse it with Lime (Chuna) that is Calcium Hydroxide (used for chemical pasteurisation) 
 
About Calcium carbonate 900gm Chalk Powder (Used for PH balance)
 
Used as supplement and for PH balance with mushroom substrate. Used for PH balance.
Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which is a type of sedimentary rock consisting mainly of calcite) and is the main component of eggshells, snail shells, seashells and pearls.