Pond Flourish is a liquid growth stimulator for pond plant stems and leaves. It contains a broad spectrum of essential trace elements, vitamins, and amino acids. It is rich in iron, manganese, magnesium, calcium, and potassium. It contains no phosphates or nitrates that would promote algae proliferation. A 2 Liter size treats over 100,000 gallons. Works best when used with Pond Flourish Tabs.