Iron Essential is specifically formulated to provide essential iron; magnesium and other micronutrients that help to enhance the colour of the aquatic plants as well as accelerating its growth. This supplement provides vigorous growth to the roots and leaves of the plant and contains no phosphate that can cause unwanted algae growth. Iron Essential supplement can be used simultaneously with all other Dymax plant range products such as: Flora Plus; Potassium Plus; Phosphorus Plus and Carbon D Plus as needed to provide a balance of nutrients for healthier plant growth. Directions: Add 10ml (1capful) of solution to every 60L of water. Dissolve with some water before adding directly into the aquarium. Add supplement weekly or after every water change. Use for plant aquarium only. Safe for Shrimp. Shake well before use.