Hanna Marine Magnesium Checker
SKU 133353J
- Ships Australia-wide — fast dispatch from Eastwood
- Or collect in store with the rest of your order
- Genuine stock — marine specialists since 2012
Overview
Magnesium is one of the three core elements — alongside calcium and alkalinity — that stony corals rely on to build their skeletons, and low magnesium can quietly undermine both calcium and alkalinity stability without an obvious cause. The Hanna Marine Magnesium Checker is a dedicated handheld colorimeter built to measure magnesium accurately, without relying on the human eye to match colours on a test kit chart.
It bridges the gap between basic hobbyist test kits and full laboratory instrumentation, giving genuinely repeatable digital results at an accessible price point.
Key features
- Dedicated single-parameter colorimeter for magnesium testing
- Uses a colorimetric EDTA method with calmagite indicator for accurate, repeatable results
- Digital LCD readout removes the guesswork of matching colours by eye
- Color-coded syringes and pre-measured reagents for simple, consistent testing
- Compact, portable design with auto shut-off to preserve battery life
Who it's for
Reef keepers who want more accurate, repeatable magnesium readings than a standard titration test kit can offer, particularly useful for anyone dosing magnesium as part of a calcium and alkalinity supplementation routine.
Setup & tips
- Keep the sample cuvette clean and free of scratches for the most consistent readings over time
- Test magnesium alongside calcium and alkalinity, since the three interact and imbalances in one can affect the others
- Order replacement reagents ahead of time so you're never caught without a way to test
- Store the checker and reagents in a cool, dry place away from direct sunlight
