Product description
The JBL GH test measures general hardness, the constant hardness of aquarium water. For shrimp, GH is one of the key values to track, especially at water changes and when you mix RO water.
Follow the pack instructions and compare the colour with the scale. Write the result down so you can see changes over time.
Store the reagents cool and dark. A GH test does not replace KH or pH tests – the three values belong together.






