General Hydroponics KoolBloom 16lb is a bloom booster fertilizer that is specially formulated to encourage abundant flowering and to maximize yields. It is a highly concentrated nutrient supplement that is designed to be used with your regular nutrient program to supercharge your plants for heavier and bigger blooms, increased aroma and essential oils, and more abundant yields. KoolBloom contains a unique blend of phosphorus, potassium, and micronutrients that are essential for the growth and development of flowers, fruits, and vegetables. It also has a special pH buffering agent to maintain an optimal nutrient uptake, as well as a blend of organic compounds to ensure maximum nutrient availability. This fertilizer is suitable for both hydroponic and soil-based growing systems and can also be used in combination with General Hydroponics' other nutrient products.