ADA Iron Bottom Long – 30pcs ADA Iron Bottom provides essential nutrients that can be absorbed by the plant directly through the roots of the plant. Iron Bottom is particularly good for Cryptocoryne and Echinodorus species as these plants take the majority of nutrients needed through their roots. Use in conjunction with a liquid fertiliser system. Iron Bottom is a stick of nutrients that can be applied easily by inserting it to the substrate. It provides the perfect balance of nutrients and iron, and helps to avoid whitening of the plants.