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. It contains no phosphate or nitrate or other fertilizers that would promote algae proliferation. A 100 mL bottle treats up to 5,000 gallons. It is also beneficial for household plants.