High-quality material: The carbon dioxide detector is made of high-quality glass, which is durable and ensures stable test results. Unique design: note shape and shape design of note, beautiful and practical. The appearance of transparent color can effectively observe the color change of the detection liquid, so as to understand the changes of oxygen and carbon dioxide content in the aquarium. Easy to Install: Place the glass CO2 monitor funnel up, drop in the CO2 detection solution, slowly turn the detector so that the solution enters the small bulb, then turn the funnel down and install it finally 2.5-5 cm below the instrument The water level of the aquarium. Applicable to: It is used for detection and monitoring of aquarium aquatic plants and aquarium concentrates.