Easy Life Easy Start is a highly effective natural filter bacteria for starting up and maintaining both freshwater and saltwater aquariums. The special bacteria carrier speeds up the increase of useful bacteria, so that the formation of poisonous nitrite can be avoided. Easy Start also helps to reduce the effects of harmful bacteria and removes heavy metals and other chemical contaminates. Using this product will help you have a very healthy aquarium with lively, vibrant, and colourful fish. Available in 100ml, 250ml, and 500ml bottles. This 100ml bottle treats up to 500 litres at the standard dose.