NeoMarine Salt mix from Brightwell Aquatics is formulated to match natural seawater chemistry. NeoMarine was developed with an extremely accurate ratio of major, minor and trace elements, and only replenishes those utilized in biological reactions. Perfect for reef aquaria. Closely monitored through manufacturing, this salt contains no unwanted elements, only high-quality ACS and USP-grade ingredients are used. Mixes to 1.025 g/cm3 for clean, easy water replenishment.