The Red Sea 175 gallon bucket reef salt is an all-natural eco-friendly product that provides biologically balanced levels of foundation elements essential for a thriving saltwater aquarium environment. It includes a full complement of trace elements and guarantees stable parameters when mixed with RO water, ensuring no harmful nitrates or phosphates are present in your tank. This salt mix is ideal for reef enthusiasts looking to maintain the optimal conditions for LPS and SPS corals as well as growing coral frags.