Crushed Oyster Shell, Mushroom Substrate additive, Calcium , 1/4 pound, Organic

Description

Crushed Oyster Shell
is a good source of calcium carbonate, many use it as a pH. buffer. Our oyster shells are crushed, screened and prepared for use. Our crushed oyster shells are clean and odorless.
This listing is for one 1/4 pound bag of unsterilized Natural Crushed Oyster Shell.
Mix with other substrate compounds Such as hardwood pellets, Coco Coir, Rye Grain and any other materials your mushrooms may require.