Flourish™ is a growth stimulator for aquarium plant stems and leaves. It contains a broad spectrum of essential trace elements, vitamins, and amino acids. Flourish™ is rich in gluconate iron, manganese, calcium, magnesium, potassium, inositol, choline B12, biotin, and other factors that have been determined to be beneficial to aquatic plants. It contains no phosphate or nitrate or other fertilizers that would promote algae proliferation. A 500 mL bottle treats up to 25,000 gallons.