Chlor is a concentrated conditioner designed to remove harmful chemicals such as chlorine and chloramine from freshwater and saltwater aquariums. Chlor is five times more concentrated than competing products and will also detoxify any heavy metals found in tap water at typical concentration levels. Aquarists can rest assured that the solution is non-acidic and will not impact delicate pH balances in the aquarium. Chlor is Perfect for new tanks and any time you add or replace water.

Manual :

Use 1 cap (5 ml) for every 200 L (50 US gallons) of new aquarium water. The solution can be added directly to the aquarium, but it is significantly better if added to the new water first. If you are adding the solution directly to the aquarium, base the dose level on the volume of the aquarium. For exceptionally high chloramine concentrations, a double dose can be used safely without harm to aquatic animals. If the temperature is > 30°C (86°F) and chlorine or ammonia levels are lower than normal, use half a dose.