Glossary
Alkalinity
Water's capacity to neutralize acid. Reported as dKH, meq/L, or ppm CaCO₃.
Alkalinity is the most-tested parameter in reef chemistry because coral calcification consumes it. Target: 8–10 dKH for mixed reefs, 7.5–8.5 dKH for SPS-dominant tanks running low-nutrient.
Recommended
Test kits for alkalinity.
Salifert KH/Alkalinity test kit
The hobbyist standard for alkalinity testing.
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Hanna Marine Alkalinity Checker (HI-755 / HI-772)
Digital alkalinity. Quicker than Salifert, similar accuracy.
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