Inject 1 ml of CO2 indicator solution into CO2 indicator directly. It is recommended to change CO2 indicator once a month. Compare the color of the CO2 solution with the included scala and determine the CO2 content of your aquarium water.
Inject 1 ml of CO2 indicator solution into CO2 indicator directly. It is recommended to change CO2 indicator once a month. Compare the color of the CO2 solution with the included scala and determine the CO2 content of your aquarium water.
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