Hanna Magnesium Checker

The Hanna Magnesium Checker is a pocket colorimeter that measures magnesium in saltwater aquariums from 1,000 to 1,800 ppm. Magnesium keeps calcium and alkalinity available to corals, and low levels show up as unstable calcium and alkalinity readings. It suits reef and fish-only marine tanks.

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Details

Category

Equipment & supplies

Brand

Hanna

Model

HI783

Tests for

Magnesium

Range

1,000 to 1,800 ppm

Resolution

5 ppm

Accuracy

±5% of reading at 25 °C

Method

Colorimetric EDTA method with calmagite indicator

Light source

LED at 610 nm

Light detector

Silicon photocell

Battery

1.5V AAA alkaline

Auto shut-off

After 10 minutes of non-use

Sample temperature

18 to 28 °C once reagents are added

Interferences

Calcium below 300 ppm or above 500 ppm

Dimensions

86 x 61 x 37.5 mm

Weight

64 g

Suitable for

Saltwater aquariums