The Seachem Plant Enhancer is a perfect starter pack for beginning aquatic gardeners. Containing 3 x 100 mL bottles of Flourish Nitrogen, Flourish Phosphorus and Flourish Potassium. Flourish Nitrogen™ is a concentrated blend of nitrogen sources. It provides nitrogen in both the nitrate form and the plant-preferred ammonium form. Flourish Phosphorus™ is a safe solution of potassium phosphate that takes the guess work out phosphate dosing. Flourish Potassium™ contains 40,000 mg/L of potassium suitable for the natural freshwater aquarium. Potassium is an important element that is needed by all plants. This combination of enhancers will really help your plants to flourish!