Mycology Basics Gypsum Powder for Mushroom Substrates – Ultra-Fine Lab Grade, Food Grade, HEPA Sterile Packaging (1.0 lb)

Elevate your mushroom cultivation with Mycology Basics Gypsum Powder, a bulk, ultra-fine lab grade option designed for purity and performance. This gypsum is a fine, water-soluble powder with a high purity profile: 97% calcium sulfate dihydrate, 22.5% calcium, and 18% sulfur. It ships additive-free and dissolves cleanly into mixtures, helping you achieve consistent texture without unwanted residue.

Purity, solubility, and texture

The chemistry matters. This gypsum delivers a mineral blend that dissolves readily in water, promoting even distribution across substrates or culinary blends. The fine powder texture makes measuring and mixing straightforward, supporting a smooth final consistency in your projects.

• 97% calcium sulfate dihydrate with 22.5% calcium and 18% sulfur for balanced mineral content
• 100% water soluble and residue-free for clean mixing
• Highest grade organic gypsum without additives
• Resealable bag preserves powder freshness between batches

Contamination control and packaging

Gypsum is shipped in a humidity-controlled environment inside a HEPA enclosure to minimize exposure to contaminants and clumping. The sealed packaging helps maintain powder fineness and ease of use over time.

• Humidity-controlled enclosure to reduce contamination risk
• Resealable packaging for long-term storage and convenience

Versatility for mushrooms, soil, and kitchen shelves

Beyond mushroom substrates, this gypsum supports garden and culinary uses. When paired with garden lime, it can influence soil texture and nutrient dynamics, potentially aiding in texture and runoff management in garden applications. In the kitchen, it serves as a mild thickener for brewing or tofu recipes, offering a mineral-rich option for body and structure.

• Ideal for mushroom substrates and substrate preparation
• Supports soil structure when used with garden lime
• Suitable as a thickener for brewing and tofu or other recipes

Storage and handling are straightforward. Keep the resealable bag closed between uses, store in a cool, dry place, and measure with a clean scoop to maintain powder quality for future batches.