Chihiros Drop Checker Tiny

Made of high quality glass Appealing drop-design Monitors the carbon dioxide level in the water CO 2  is one of the most important nutrients for aquarium plants. At the same time, too much CO 2  can hurt other organisms of the aquarium. For this reason, long term monitoring of the CO 2  levels in the aquarium is highly recommended. After inserting a CO 2  reagent into the CO 2  Drop Checkers and placing it in the aquarium, the color will change according to the concentration of dissolved CO 2  in the aquarium water. Green will indicate a proper CO 2  value, yellow will indicate to much CO 2  and blue will show not enough CO 2 .