Freely available, this product displays pH values (6.4 - 7.8) as well as CO2 content, allowing for simple and safe control of aquarium water values. It provides permanent direct measurement of the optimum pH value and carbon dioxide content for freshwater aquariums. The continuous test for fertilization control involves placing a reagent in the continuous test device and attaching it to the aquarium glass with suction cups. You can compare the reagent color with the color scale sticker to read off the value. The online laboratory offers regular control for a healthy aquarium with near-natural conditions. For each water analysis, it provides water tests in the form of quick tests or color change tests, ensuring your aquarium water remains healthy and clear.