Zoolek Aquatest Ca-Mg Calcium and Magnesium Water Test

The Zoolek Aquatest Ca-Mg is a drop test for measuring calcium and magnesium content and general hardness in freshwater.

The test is meant for freshwater aquariums, especially planted tanks, where the ratio between calcium and magnesium matters as well. According to the available data, magnesium can be lacking even when general hardness is correct.

The measurement is based on titration. Add the reagent to the water sample drop by drop until the colour changes according to the enclosed colour chart. Calcium and magnesium are read in mg/l, general hardness in German degrees.

If the content is too high, a partial water change is recommended, or Filtrax GH/KH to lower general and carbonate hardness.

The set includes reagent bottles, containers of powder reagents, a syringe, a spatula, a test tube, instructions and picture instructions with a colour chart.