Aquarium CO2 Bubble Counter with Built-in Check Valve for CO2 Generator Regulator, Single Head

Features

• Screw connection, compatible with many CO2 needle valves. Easy to set up.
• Built-in high-quality check valve to prevent back-siphoning. The bubble counter is designed to accurately monitor air-flow rate, it helps to keep and maintain a healthy aquarium.
• DURABLE: Both ends are made of aluminum alloy to avoid softening or breaking; The middle transparent cylinder is made of PC, injection molding mode, more robust, safer and more pressure-resistant than acrylic or other materials.
• It needs to be filled with water before use. Compatible with 4/6mm (3/16" inner diameter) Co2 tubing.
• Quality inspection, rather than random inspection We are serious about quality control and buyer experience If there are any questions, suggestions or ideas, please feel free to contact us.