Transparent Aquarium Carbon Dioxide Monitor

Original price was: £18.00.Current price is: £12.00.

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Maintaining proper Carbon Dioxide (CO2) levels in the planted aquarium is one of the most important factors in the health of the planted aquarium ecosystem. A CO2 checker is an essential tool for monitoring CO2 levels in the aquarium. The CO2 checker is a reservoir designed to contain an indicator solution and an airspace.

When the drop checker is submerged in the aquarium, the carbon dioxide will out-gas from the aquarium water into the airspace of the drop checker and will eventually be absorbed into the indicator solution.
The carbon dioxide gas will seek a point of equilibrium between the indicator solution and the aquarium water.
As equilibrium is achieved, the color of the indicator solution inside of the drop checker will change based on the concentration of CO2 in the aquarium water.

How to use:

1. Will test agent about 15 (or according to the actual amount) drops into the monitor, need not to add water
2. Change again every 30 days, airtight preservation at room temperature.


1. Stick the checker on the edge of the aquarium.
2. Ensure water level cover the opening of the checker.
3. CO2 indicator reagent not included!


HeightApp. 5.5 cm / 2.17″
DiameterApp. 3 cm / 1.18″

Additional information

Weight0.3 kg


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