Package included: 1x aquarium CO2 checker(no including indicating solution), 1 x small dropper.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
No suction cups required. Simply hang it on the edge of your planted aquarium
Suitable for fish tank, aquarium, especially aquatic plants, tropical fish to watch and cultivate for fish tank
Easy maintenance, since it is not under water, it won't grow algae on the glass.