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Why RO/DI Water Matters for Saltwater Aquariums

 Why RO/DI Water Matters for Saltwater Aquariums

For saltwater aquarium owners, water quality is more than a number on a test kit—it’s the foundation for stable salinity, safer chemistry, and long-term coral health. That’s why many reef keepers rely on RO/DI (reverse osmosis/deionization) water instead of tap or even bottled sources.

RO/DI systems strip out dissolved solids and impurities before you ever add salt mix. Tap water can contain calcium and magnesium, elevated total dissolved solids (TDS), trace metals, ... Read more »

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