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Simple and reliable monitoring of the aquarium water values. Determines the ideal pH value in freshwater aquariums Laboratory comparator system to compensate inherent water colouring: read off sample water & reagent on chart in holder When to use: daily for one week in newly set up aquariums, afterwards weekly Find detailed information & troubleshooting tips about water analysis on the JBL website in Essentials/Aquarium or Pond Contents: 1 quick test, pH test 6.0-7.6 for approx. 80 measurements with glass vials, syringe, spoon, comparator block