CLEARS CLOUDY AQUARIUM WATER - Use to clear cloudy water in your aquarium as part of your regular maintenance routine to clear fine particles of waste too fine to be trapped by your filter FAST ACTING - Pour in Quick Clear and see the effect almost instantly NATURALLY SAFE - Safe for fish and aquatic plants SUITABLE FOR FRESHWATER AQUARIUMS - Can be used in any freshwater aquarium, along with any other Interpet aquarium water treatment, and does not affect filtration EASY TO USE - 1ml of Quick Clear treats 5 litres of aquarium water, this bottle treats 250 litres