2xCarbon Dioxide CO2 Monitor Glass Drop Checker Indicator Aquarium Religion & Spirituality It's a great help for

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Size : As show in the picture

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ITEM NAME:250V

2xCarbon Dioxide CO2 Monitor Glass Drop Checker Indicator Aquarium Religion & Spirituality It's a great help forITEM NAME: 2xCarbon Dioxide CO2 Monitor Glass Drop Checker Indicator Aquarium img *{margin: 0; padding: 0;. Aquarium CO2 Monitor Carbon Dioxide Glass Drop Checker with 15 ml Monitor Fluid. Different color of liquid represents different concentration of CO2. 2 X Glass CO2 Monitor. Concealed glass groove is easy to open and fill into liquid.