2 Pack CO2 Drop Checker, Aquarium Tester Monitor Glass Checker Detector for Planted Fish Tank

Essential CO2 Test Tool: Fish tank co2 drop checker can help you monitor co2 content in the aquarium and keep the health of your fishes and plants. Application: CO2 drop checker is suitable for aquarium and fish, especial for ornamental and breeding of aquatic plants and tropical fish. Premium Material: 2 Pack aquarium co2 checker is made of high-quality glass material, non-toxic and odorless, safe and durable. Transparent color, easy to observe and clean. Proper Size: The size of aquarium co2 monitor is 5*5cm. With suction cup, easy to attach to the wall of fish tank. Easy To Use: Drop 5 drops co2 indicator solution (not include) and some aquarium water into aquarium co2 detector, and then attach to the inner wall of aquarium. (You need to install the monitor below the water surface about 10cm)