Wyin Aqua Inline CO₂ Bubble Counter with Syringe Refill

The Wyin Aqua Inline CO₂ Bubble Counter with Syringe Refill is a practical solution for monitoring and fine-tuning your aquarium’s CO₂ injection. Designed for use with standard 4/6mm CO₂ tubing, this bubble counter fits seamlessly inline between your CO₂ regulator and diffuser, allowing you to visually track bubble count and adjust your CO₂ flow with confidence.

Made from durable aluminium with a clear acrylic chamber, this unit combines durability with clean, modern styling. The standout feature is the syringe refill port—quickly top up the chamber without disassembling any parts. Just use the included syringe to refill with water or bubble counter fluid in seconds.

Unlike traditional bubble counters that require unscrewing or removal to refill, this model allows convenient, mess-free maintenance. Evaporation of the fluid inside the chamber is a common issue over time, and the syringe port makes it incredibly easy to top up regularly without disrupting your CO₂ setup.

Additionally, this bubble counter features a built-in check valve on one end, which prevents water from flowing back into your CO₂ system—adding an extra layer of protection for your regulator and solenoid.

• Material: Aluminium body with clear acrylic reservoir
• Tubing Compatibility: Fits 4/6mm CO₂ tubing (both ends)
• Refill Method: Top-mounted port for clean, fast syringe refilling
• Function: Visually monitor CO₂ flow via bubble count
• Check Valve: Integrated on one end to prevent backflow
• Includes: Bubble counter, 5ml syringe, O-rings and fittings
• Application: Installed inline between your regulator and diffuser