They contain essential trace elements, amino acids, and vitamins. 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.
Potassium is an important element that is needed by all plants.
In a thriving planted aquarium it can become the limiting factor to growth if it is depleted. Contains no phosphate or nitrate. All plants require a source of carbon. 250 mL will treat 50 gallons for 1-2 months. It contains a broad spectrum of essential trace elements, vitamins, and amino acids.