JBL Ferropol Root contains all the nutrients roots need in a readily accessible form. This means the water is not contaminated. Depending on their species aquatic plants absorb a significant portion of their mineral nutrient supply through their roots. The stronger the aquatic plant root, the more nutrients are absorbed this way. In addition the root hairs of aquatic plants have the particular facility to solubilize precipitated iron (Fe3+) and thus supply it to the plants.Plant genera which absorb a lot of nutrients through the roots:Echinodorus, Cryptocoryne, Vallisneria, Crinum, NympheaPlant genera which absorb their nutrients through the leaves and roots: Ludwigia, Limnophila, Hygrophila, Alternanthera, CabombaJBL Ferropol Root:+ concentrated iron and minerals stored in tablet form to promote the root development of aquarium plants+ press one tablet per month deep into to the root area of the soil. 1 tablet/5-10 stems+ supplies plant roots with nitrogen, phosphorus, potassium, iron