Hanna Instruments has completed the reefkeeping set with the release of its Magnesium tester. Joining Alkalinity, Calcium, Nitrate, and Phosphate, Hanna users can now utilize a Hanna product to test the Magnesium levels in their reef tanks, from 1000-1800ppm. For the uninitiated, Hanna handheld test kits use colorimeter technology to measure the transmittance of light…
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