Cultured Solutions® COCO CAL is a concentrated blend of readily available Calcium and Magnesium. It is formulated to assist fast growing plants by preventing secondary nutrient deficiencies. Instructions Seedlings/Cuttings: 0.5-1mL per gallon, adjust solution to a 5.8 pH. General: 2-5mL per gallon, adjust solution to a 5.8 pH. Rockwool/Coco/Soilless: Refer to Cultured Solutions Drain to Waste Feeding Schedule. RDWC/DWC/NFT/Aero: Refer to Cultured Solutions Recirculating Hydro Feeding Schedule. For recommendations not covered in the Cultured Solutions Feeding Schedule, contact support at email@example.com. – Recommended starting EC for source water should be 0-20ppm. – Shake Well Before Use. – Do not pour unused fertilizer back into the bottle. – Maintain clean measuring devices. – Store in a cool, dark area.