The API Leaf Zone Aquarium Plant Food is a nutrient-rich formula that promotes the growth of healthy, lush green leaves. This food is designed to be quickly absorbed by plant tissue, so it’s ideal for use in aquariums with fast-absorbing plants or fish. It contains chelated iron and potassium, which are essential for plant growth. The API Leaf Zone Aquarium Plant Food is also safe for use in freshwater aquariums.