- -10%
This refill is designed for the JBL PROAQUATEST KH test. It measures carbonate hardness (KH), an essential parameter for the stability of pH and the biological balance of aquariums and ponds.
Fill the plastic test tube with the water to be tested, then add the reagent drop by drop. The color change from blue to yellow indicates the end of the measurement. The number of drops added directly corresponds to the KH value in German degrees (°dKH).
Refill compatible with the JBL PROAQUATEST KH kit, allowing you to extend the use of the test without replacing all the equipment.