Calcium Sulphate, also known as Gypsum.
Improves the porosity of sawdust substrates and provides essential elements (sulfur and calcium) for the growth of mycelium, which increases crop yield.
Gypsum wil also slightly lower the pH of water.
Gypsum (CaSO4) - 22,68kg
is backordered and will ship as soon as it is back in stock.