Why you must choose our CO2 drop checker? Our CO2 Glass Drop Checker is perfect for planted aquarium. It is made of premium thick glass that is hard to break and damage. With the suction cup design, it is easy to install and operate and can fix on the aquarium firmly.

And the fine, see-through glass is blended in the environment of aquarium, which can create a sense of harmony and unity. You can easily read the CO2 level according to the color change of CO2 indicator solution. The original color is blue, when it turns green, it means that CO2 destiny is right and balanced.

If it turns yellow, there is too much CO2 in the tank. You can make the necessary adjustments and test until you get green. Our CO2 checker can make your tank have optimal CO2 level that is healthy for both plants and fish. Whats more, our CO2 Drop Checker comes with solution.

It is very important to use 4dkh fluid and ph reagent in your Co2 drop checker. If you dont use 4dkh fluid, your reading is very likely to be inaccurate and you wont have a good idea of what the actual co2 levels are. Package Included: 1 x CO2 Glass Drop Checker 1 x Suction Cup 1 x Solution