Seachem Flourish Iron 20L (5.3 gal)

Flourish Iron™ is a highly concentrated (10,000 mg/L) ferrous iron (Fe⁺²) gluconate supplement. It should be used in those cases where the iron requirements exceed that which can be delivered by Flourish™ at the recommended dose or signs of iron deficiency appear (such as short and slender stems or yellowing between veins.) Plants are able to much more easily derive a benefit from Flourish Iron™ than from EDTA-iron sources because all EDTA iron is in the ferric (Fe⁺³) state. Since plants require iron in the ferrous state, additional physiological energy must be expended in order to extract the ferric iron from EDTA-iron and then convert it to the ferrous form. Contains no phosphate or nitrate.

Sizes:100 mL, 250 L, 500 mL, 2 L, 4 L, 20 L