Hanna Marine Magnesium Checker HC - HI783 aquarium salinity tester 470 mV) recommended for optimal

470 mV) recommended for optimal accuracy

Dual Line EC/TDS Monitor w/ 4-20mA Output

pre-measured reagent dose using the industry-standard DPD colorimetric method

When to Replace Your Sediment Filter

Automatic Calibration

Hanna Marine Magnesium Checker HC - HI783 aquarium salinity tester 470 mV) recommended for optimalThe first Magnesium test of its kind for saltwater aquariums, our Marine Magnesium Checker HC (HI783) is just what every reef tank owner needs. Struggling with test kits is now a thing of the past. Stop guessing or interpreting a color change by eye. Get a fast, accurate digital read out every time. Perfect for testing and measuring Magnesium levels in saltwater aquariums, reef tanks, and other marine and aquaculture applications. Easy to read,