Marine salt is the foundation of any saltwater aquarium, providing the correct mix of minerals and trace elements to mimic natural seawater. High-quality marine salts are formulated to deliver stable levels of salinity, alkalinity, calcium, magnesium and key traces, giving fish and corals the conditions they need to thrive. Different blends are available for fish-only, mixed reef and SPS-dominated systems, so you can choose a salt that matches your setup and target parameters. When mixed with pure RO/DI water and tested regularly, a good marine salt makes maintaining clear, healthy, reef-ready water far easier.
