Seachem Flourish Tabs are growth stimulating tablets for plant roots. They contain essential trace elements, amino acids, and vitamins. They are rich in iron, manganese, magnesium, calcium, potassium, inositol, choline B12, biotin, and other factors that have been determined to be beneficial to aquatic plant roots. They contain no phosphate or nitrate that would promote algae proliferation. Each pack of ten tablets treats a 12 X 30 inch plant bed twice. Perfect for the beginner, Seachem Flourish Tabs contain all the nutrients found in Flourish in a dry, tabular form. These tabs are inserted into the gravel, providing direct, time-released fertilization to the plantsroot zone. Nutrients are slowly made available through enzymatic action of the plantsroots on the tabs.Seachem Fluorish Tabs+ gravel bed supplement for the planted aquarium+ provides micro elements, trace elements and other nutrients+ targeted fertilisation of the root zoneGuaranteed Analysis:Total Nitrogen (N) 0.28%Avai