Ca and Mg test

This kit is for keepers of planted aquariums who need to check calcium and magnesium separately, not just total water hardness. Two water parameters can look correct on a general hardness reading while magnesium is still too low for plant growth, and this kit shows both values.

Why it matters

• Titration method: reagent is added to the water sample drop by drop until the colour changes to match the reference colour chart.
• Results are given for Ca2+ and Mg2+ in mg/l, and total hardness in German degrees (°dH).
• Magnesium sits at the centre of the chlorophyll molecule, so its level directly affects photosynthesis. The recommended Mg:Ca ratio is about 1:5.
• The test also measures total hardness across a wide range of values.

Specifications

• Symbol: Test Ca-Mg Zoolek fresh
• Brand: Zoolek
• EAN: 5907527411409
• Weight: 0.1 kg
• Measured parameters: calcium (Ca2+) and magnesium (Mg2+) in mg/l; total hardness in °dH
• Contents: 3 reagent bottles, 2 containers of powdered reagent, 1 syringe, 1 test tube, instructions, picture instructions with reference colour chart

What it works with

The kit is designed for planted freshwater aquariums, where the calcium and magnesium balance is checked alongside general hardness. Use the reference colour chart from the picture instructions to read each result. The test is suited to hobbyists who want to confirm the Mg:Ca ratio before adjusting water or fertiliser routines.