Simple and reliable monitoring of the water values in aquariums/ponds. Determines the ideal iron value in fresh and marine water Laboratory comparator system to compensate the inherent water colour: fill glass vials with sample water, add reagent to one vial, place vials in holder, read off colour values of the sample on colour chart Use: 1 x after setting up a new aquarium, afterwards weekly. In case of green algae problems or when plants don’t grow properly You will find detailed information and troubleshooting tips about water analysis on the JBL website in Essentials/Aquarium or Pond Package contents: 1 iron quick test for approx. 50 measurements, incl. reagent, 2 glass vials with screw caps, syringe, comparator block and colour scale. Reagent refill separately available