Reef Elements Reef Shot is a biological stimulant designed to promote growth and health of your reef aquarium.  It contains essential trace elements in special compounds easily absorbed by marine organisms and fish. Reef Elements Reef Shot eliminates the development of fishes goiter, skin injury not caused by bacteria, crustaceans molting difficulties. It promotes the regeneration and the reproduction of stony corals, sabellidae, bivalves, echinoderms, sea stars and fishes. – Instructions : The biocatalysts contained in Reef Elements Reef Shot encourage vital processes such as growth and reproduction. The most well known are vitamins, hormones and enzymes. Reef Elements does not contain any organic or inorganic calcareous substances. Shake well before use. Add a vial (20ml) of Reef Elements Reef Shot per 200 litres of water every two weeks. 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.  Do not mix different products together prior dosing. 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.