Features: Contains macro nutrients (nitrogen, phosphorus and potassium) and other elements to boost the growth of aquatic plants. New formula combines DTPA Ferrous iron, EDTA trace elements (Mn, Zn, Cu, etc.) and the essential nutrients for water plants, all in one bottle. Effectively cure symptoms like chlorosis, browning, weak steams and roots, dying leaves and pale veins. How to use: Use cap as measure scale, inner cap is 5ml and outer cap is 10ml. Recommended weekly water change: 30-50%. For weekly use, use 10ml for every 60L of water. Cautions: Store in cool area, avoid direct sunlight. Keep out of reach of children.