Simple and reliable monitoring of the aquarium water values. Determines the ideal pH value in freshwater aquariums Laboratory comparator system to compensate the inherent water colour: fill plastic cuvette with sample water, add reagent to one cuvette, place both cuvettes in holder, read values off colour chart When to use: daily for one week in newly set up aquariums, afterwards weekly Online Laboratory: regular monitoring for a healthy aquarium with natural conditions. JBL has water tests in the form of quick tests or colour change tests for every water analysis. Testing aquarium water for healthy, clear water Package contents: 1 quick test, pH test 6.0-7.6 for approx. 80 measurements. Incl. reagent, 2 glass vials with screw caps, syringe, comparator block and colour scale. Reagent refill separately available