Hanna Marine Magnesium Checker HC - HI783 aquarium salinity tester Optically clear borosilicate glass: High-quality

Optically clear borosilicate glass: High-quality construction ensures accurate light transmission for reliable measurements

Calibrate with confidence using Milwaukee M10004B — a certified

pH Value: @25°C 6

470 mV) recommended for optimal accuracy

Automatic Calibration

Hanna Marine Magnesium Checker HC - HI783 aquarium salinity tester Optically clear borosilicate glass: High-qualityThe 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,