Instant OceanINSTANT OCEAN Synthetic sea salt Instant Ocean contains all of the major, minor and trace elements necessary, ideal for all types of aquarium. Inside each 20kg box there are ten 2kg bags. 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