Seachem Flourish PotassiumSeachem Flourish Potassium provides concentrated potassium to support vigorous growth in aquariums with natural, living plants. This safe, effective supplement helps you avoid potassium depletion, yellowing leaves, and limited plant growth. Potassium supplement for the planted aquarium Helps maintain a vigorous level of plant growth Helps resolve yellowing, death browning and weak stems and roots Flourish Potassium contains 50,000 mg L of potassium