Keep aquatic plants lush and vibrant with API Leaf Zone Freshwater Aquarium Plant Fertilizer. This plant care solution is formulated for rapid absorption through plant leaves. The formula aids in photosynthesis and cell pressure maintenance, encouraging the growth of beautiful aquatic plants. Essential nutrients including chelated iron and potassium prevent yellow, decaying leaves and promote strong, hardy, colorful leaves. This product is perfect for planted aquariums and contains a blend of iron and potassium which boost healthy, beautiful plant growth. It is formulated for rapid absorption in freshwater aquarium plants and can be used for weekly monitoring and when water or fish problems appear.