Instant Ocean contains all of the major, minor and trace elements necessary, ideal for all types of aquarium. It does not contain nitrates or phosphates. It was developed in the course of extensive biological and chemical experimentation and each batch is analysed in order to ensure uniformly superior quality. Exceptional solubility, uniform particle size and high quality packaging have made Instant Ocean the first choice of tropical fish hobbyists for more than 45 years. Our guarantee is based on actual facts proven by users. Instant Ocean is the most popular marine salt brand in the world. Formats available: 10 litres, 2 kg (60 litres*), 4 kg (120 litres*), 8 kg (240 litres*), 16 kg (480 litres*), 25 kg (750 litre*).