Dymax Instant Start is a complete and concentrated conditioner for both fresh and saltwater use. This solution specifically formulated to remove chlorine; chloramines and detoxify heavy metals from tap water at typical concentration levels and make it safe to use immediately. Apart from being a dechlorinator like other brands Instant Start is also formulated with an additional disease preventative feature to promote a consistent reproduction of slime coat for disease preventions and increase fishes immunity. Directions: Add 10ml (1capful) of solution to every 200L of water. Dissolve with some water before adding directly into the aquarium. Use every water change. Use for both freshwater and marine aquarium. Shake well before use. Can safely use 2 times the dosage for fish disease prevention.