Mesh #16 Sifted Natural Gypsum
CaSO₄ | Calcium Sulphate

Essential Mycelial Nutrition & Soil Structure.

Avoid the traps of industrial Plaster of Paris or coarse, unrefined building gypsum that can cement your grow matrices. This natural, agricultural-grade Calcium Sulphate is mechanically sifted through a precise Mesh #16 screen at the STS. It delivers essential Calcium and Sulphur to your crops and mushroom bulk substrates without altering your target baseline pH.

🛠️ Technical Specifications & Field Benefits

• Mesh #16 Precision Sifting: Broken down and screened to a uniform particulate size. It distributes flawlessly through your substrate mixes, providing immediate root/mycelial access without clumping or creating dense, hydrophobic spots.

• The Fungi Grain Shield: The ultimate secret weapon for grain spawn preparation. Tossing a small amount of this sifted gypsum into your grain prevents the kernels from bursting and sticking together during sterilization, maintaining crucial individual air pockets for fast, aggressive colonization.

• Flocculates Bulk Substrates (CVG): Essential for balancing the structure of your Coco Coir and Vermiculite bulk mixes. It helps bind micro-particles together, keeping the overall substrate fluffy, well-aerated, and highly receptive to rhizomorphic growth.

• Pure Nutrition, Zero pH Drift: Unlike Calcium Hydroxide, Gypsum is pH-neutral. It allows you to heavily supplement your systems with bio-available Calcium (Ca) and Sulphur (S) without causing a massive alkaline spike that could stall sensitive biological processes.

• 100% Natural Origin: Unrefined, raw agricultural mineral deposit. Free from the synthetic chemical binders, accelerants, and anti-caking additives found in commercial construction hardware products.

500gram packaged in a standup pouch.