Potassium is one of several elements that are vitally important to maintaining a vigorous level of growth in a planted aquarium. Dymax Potassium Plus contains 50.000mg/L of potassium. Fully suitable for the natural planted aquarium in order to maintain the highest level of plant growth. Directions: Add 10ml (1capful) of solution to every 60L of water. Raises potassium level by 2mg/L per dose. Dissolve with some aquarium water before adding directly into the aquarium. Add 2-3 times per week or as needed in response to signs of potassium deficiency. Symptoms: chlorosis (yellowing); necrosis (death/browning); pinholes in leaves and weak stems and roots. Shake well before use.