Highly concentrated ferrous iron gluconate supplement. It should be used at the recommended dose or when signs of iron deficiency appear (such as short and slender stems or yellowing between veins.) Contains no phosphate or nitrate.
Flourish Iron is a companion product to Flourish and Flourish tabs. It is a complexed ferrous (fe+2) iron product which contains 10,000 mg/l of iron and is ideal for iron maintenance in the natural planted aquarium. Plants can utilize both ferric (fe+3) and ferrous (fe+2) iron, although they prefer ferrous iron when available.