Permanent test to determine the acid/carbon dioxide content in freshwater aquariums. Simple and reliable monitoring of the aquarium water values. Permanent direct measurement of the pH value and carbon dioxide content in freshwater aquariumsPermanent test for fertiliser control: place reagent in the permanent test device and attach to the aquarium pane, using suction cups. Compare reagent colour with colour scale sticker and read off valueIndication of pH value (6.4 – 7.8) and CO2 contentYou will find detailed information and troubleshooting tips about water analysis on the JBL website in Essentials/AquariumPackage contents: 1 CO2-pH permanent test, display vessel with suction cup, 1 reagent (+ 1x refill) and colour scale sticker. Reagent refill and indicators separately available