100% brand new and high quality Features: High quality of materials. Easy to use and convenient to detect concentration of CO2. Suitable for all kinds of fish tank. Different color of liquid represents different concentration of CO2. BLUE means that CO2's concentration is too low. GREEN means it is normal. YELLOW means that CO2's concentration is too high so that it is harm to fish. A wonderful indicator for feeding fish and observing their living condition. Clear to know and useful. 1 pc of indicator only,other accessories demo in the picture are not included! Specification: Type: Waterdrop Color: As pictures shown Size: One Size Liquid Height: 7.5cm(2.95in) Indicator: 3.5x2.5cm(1.38x0.98in) Sucker: 2.5x2.5cm(0.98x0.98in) Quantity: 1 Pc Note:1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x CO2 indicator
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