Solution Grade Calcium Sulfate Gypsum

Solution grade calcium sulfate gypsum is a fully soluble, finely milled calcium and sulfur fertilizer engineered for hydroponics, drip irrigation, and fertigation systems. Custom Hydro stocks ACG Valu-Fil 650 and Diamond K Premium 97 — both ground finer than 325 mesh for complete solubility with no residue or clogging.

Key Specifications

• Calcium (Ca): 22%
• Sulfur (S): 17%
• Particle size: Finer than 325 mesh
• Form: Finely milled white powder, fully water soluble
• Nitrogen-free — ideal where N inputs must be controlled

Applications

• Hydroponics — Supplement calcium and sulfur in recirculating and drain-to-waste systems
• Drip & Fertigation — Fully soluble with no residue; safe for emitters and drip lines
• Foliar — Apply as a foliar calcium and sulfur source
• Soil Amendment — Improves soil structure and water infiltration

OMRI Listed Option

Diamond K Premium 97 is OMRI listed for use in certified organic programs.

In Stock & Ready to Ship

Custom Hydro is an authorized U.S. stocking distributor of ACG Valu-Fil 650 and Diamond K Premium 97 — inventory on hand and ships fast.