Chelated Iron for for Organic Hydroponic Aquaponics Soluble - 10% - 1 Pound Highly Soluble and Suitable for all hydroponics, aquaponics, soil, and foliar applications Greenhouse grade - very pure and dissolves completely in water Prevents or corrects iron deficiencies Iron is recommended to be at 3-5mg/L or .04 - .07oz/100gallons in hydroponics or aquaponics Chelated Iron - 10% DTPA