As one of the three main macro nutrients (nitrogen; phosphorus; potassium: NPK) required by plants. Nitrogen Plus is a concentrated blend of nitrogen sources in both nitrates and or ammonia form which plants prefer. This product is made specially for planted aquaria that have no or minimum fish keeping. It will not promote algae growth with a complex formula that is only utilised by plants. Directions: Add 10ml (1 capful) of solution to every 60L of water. Rise 1mg/L of nitrogen for beginner dose. 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.