Magnesium is the third most abundant ion in seawater, surpassed only by sodium and chloride. Its abundance is critical in the formation of weak ion pairs with carbonate ions. This allows calcium and carbonate ions to be available for uptake by corals and invertebrates. Low levels of magnesium lead to low or unstable levels of calcium and alkalinity. Signs of lowmagnesium levels include precipitation of calcium as insoluble calcium carbonate and impaired inhabitant growth and health.
Primary Applications:
Marine, Saltwater Aquariums, Aquaculture
Designed as a more accurate alternative to chemical test kits, the HI758 provides quick, accurate results in four easy steps:
Specifications
| SKU | HI783 |
| Name | Marine Magnesium Checker HC Handheld Colorimeter - HI783 |
| Range | 1000 to 1800 ppm Magnesium |
| Resolution | 5 ppm |
| Accuracy | ±5% of reading @ 25 °C (77 °F) |
| Light source | Light Emitting Diode @ 610 nm |
| Light detector | Silicon photocell |
| Method | Adaptation of the colorimetric EDTA method using calmagite indicator. The reaction between magnesium and the reagents causes a blue to violet tint in the sample. |
| Environment | 0 to 50 °C (32 to 122 °F); max. 95% RH non-condensing Prepared sample cuvette (sample plus reagents) must be 18 to 28 °C (64 to 82 °F). |
| Battery type | 1.5V AAA Alkaline |
| Auto shut-off | After 10 minutes of non-use |
| Dimensions | 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”) |
| Weight | 64 g (2.3 oz) |
| Interferences | Calcium below 300 ppm and above 500 ppm |
