E-WOITD Aquarium CO2 Carbon Dioxide Monitor Transparent Glass Drop Checker PH Indicator

Describe:100% new and high qualityMaterial: glassColor: transparentSize: 40mm 60mm 70mmPackage includes: 1Pc Carbon Dioxide MonitorMaintaining proper Carbon Dioxide (CO2) levels in the planted aquarium is one of the most important factors in the health of the planted aquarium ecosystem.High quality material, stable and durable.Useful tool for monitoring CO2 levels in the aquarium.Makes it easy to figure out the CO2 level in an anqurium.Use with CO2 PH Indicator(not included), long term monitor Co2 the color show :Blue - insufficient Co2,Green - sufficient Co2,Yellow - excess Co2.