Chelated Iron DTPA for for Organic Hydroponic Aquaponics - Soluble - 10% (7oz - enough for 1000 gallons)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Highly Soluble and Suitable for all hydroponics， aquaponics， soil， and foliar applications</li><li>Greenhouse grade - very pure and dissolves completely in water</li><li>Chelated Iron - 10% DTPA - Prevents or corrects iron deficiencies</li><li>Iron is recommended to be at 3-5mg/L or .04 - .07oz/100gallons in hydroponics or aquaponics</li><li>7oz (200g) is enough for over 1000 gallons @ 5mg/L</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31724HVeD1L.jpg" noproxy>