Most corals slowly lose their brilliant colours because they are not getting all the nutrients they need. This is because corals are filter feeders and normally ingest lots of bacteria, were they get most of their nutrition, from the water. However, because of over skimming and the use of UV sterilisers aquarium water contains very little bacteria. The solution to this problem is to get nutrients back into the corals with our recommended Reef Shot Bacteria Food. We combine a selection of beneficial bacteria plus a wide range of vitamins, which will then ingested by the corals. The blend of vitamins and other nutrients will then be utilized by the corals return them to healthy, natural colouration. – Instructions : Shake well before use. Add a vial (20ml) of Reef Shot Bacteria Food per 200 litres of water every other day. A weekly change of 10-20% of the water using Reef Evolution salt is highly recommended in order to maintain optimum water quality. When adding the product, pour gently to the current in order to obtain even distribution. Allow 5 minutes between the additions of any other product. Direct contact with marine organisms should be avoided as high local concentration may be harmful. Like all chemical products, it must be kept out of reach of children.