JBL Water Test Set, For fresh and saltwater aquariums and ponds, ProAquaTest KH Carbonate hardness

Advanced water test series: Easy and safe control of the water values of aquariums and ponds, Ideal for determining the optimum carbonate hardness for fresh and salt water aquariums as well as ponds Colour change test: Fill plastic cuvette with sample water, add reagent drop by drop until colour changes from blue to yellow, number of drops corresponds to the carbonate hardness Recommended use for new installations: 1 time per week, later 1 time per month For direct use thanks to complete set with reagent and plastic cuvette, refill reagent available separately Contents: 1x JBL Water Test Set, ProAquaTest KH, incl. 1 reagent and 1 plastic cuvette