Easy Filling CO2 Bubble Counter with Non-Return Valve and Water Addition for CO2 Regulator for Planted Aquarium (Threaded Connection)

【Easy Water Filling Function】Are you always annoyed by the lack of water in your bubble meter, but it's always very difficult to remove the bubble meter? With the LINLAN water-fillable bubble meter, you can add water directly through the small hole without disassembly, thus simplifying the operation.

【Included Water Injector】With the water injector, you don't need to turn off the CO2 when adding water. Simply align the injector with the small hole on the bubble meter, ensure a tight connection with a little force, then push the water into the meter to fill it.

【Non-Return Valve】The bubble meter is equipped with a built-in non-return valve. In some cases, there may be a difference in Pressure in the air hose and the check valve can prevent water from flowing back, thus protecting the equipment.

【High-Quality Materials】The metal part is made of aluminum alloy, the hand-tightening part has threads to prevent slippage, and the central part is made of durable PC material (bulletproof glass), suitable for various aquarium environments.

【Compatible Size】The bubble counter is compatible with 4/6 mm CO2 tubing (3/16 inch inner diameter). The threaded connection type is suitable for M10x1 male connectors.