Iron for for Organic Aquaponics Soluble - 10% - 16oz (196 gallons) (16oz)<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>Prevents or corrects iron deficiencies - only 1/2 tsp per gallon needed</li><li>Iron is recommended to be at 3-5mg/L or .04 - .07oz/100gallons in hydroponics or aquaponics</li><li>Derived from Chelated Iron - 10% DTPA</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31WsN2LC7iL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/412-3%2B147jL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31fSpaFnuHL.jpg" noproxy>