GREEN- by Cal Aqua Labs is specially designed for heavily planted fishtanks where there is high demand for nutrients. GREEN contains a concentrated mix of nitrogen, potassium, and trace elements in a balanced ratio for lush, healthy plant growth. It is recommended for use in densely-planted aquariums, or planted aquariums with inert or old substrates. Use GREEN to keep plants vivid green in high-light or densely-planted aquariums, or when plants show signs of pale or yellowing in older leaves. Add 10 ml to 100 liters of water weekly, or 1 pump to 100 liters of water daily. Adding 1 ml GREEN to 100L increases nitrate by 1 ppm. Dosage may be increased in densely-planted aquarium as required. Reduce dosage if usage results in increased algae growth.