Description
Package included: 1x aquarium CO2 checker(no including indicating solution), 1x suction cup Made of high quality glass, use to measure CO2 levels at a glance Indicator color chance shows results: The CO2 indicator (C02 indicator reagent not included) color is blue, when it is blue represented CO2 insufficient; Turns green, the balance of CO2; Turns yellow, means your tank has too much CO2. Make the necessary adjustments and test until you get green
