Calcium Carbonate for Mycology

This Calcium Carbonate is made from limestone.

In mushroom cultivation, it serves as a PH buffer for the substrate. This means that the PH will remain steady as the mushroom grows. Mycelium releases acid compounds to help digest the substrate media when it expands. These acids could drastically change the PH of the substrate, making it difficult for mushrooms to fruit. Calcium carbonate prevents the substrate from becoming too acidic for the mycelium to produce fruits. Depending on the method, soak, boil, and dry your grains and add Calcium Carbonate. Mix well and then sterilize.

Use 5% of calcium carbonate for the total weight of your grain spawn.

Note: Calcium Carbonate is NOT for pasteurizing. We have a listing for Calcium Hydroxide  Ca(OH)2, which is used for pasteurization.

Looking to Make Grain Spawn or more Pre-Mixes? Check these listings in our store.

This Products is shipped from Marrickville, Sydney.

Shipping Cost and Time—The shipping cost will be displayed on the checkout screen.

Handling Time—Packages typically takes 0-3 days to prepare for shipment. Unless otherwise stated as ‘Lead time’ on the listing as something different.

Please note that handling time may vary, especially during busy holidays or sale period.

Certain products, like Colonised agar plates or Sawdust spawn, Spray and grow kit, have longer handling times as they are made to order.