Hygger CO2 Add-On Manifold Block with Needle Valve & Bubble Counter
- Suitable for HC039 Upgraded Aquarium CO2 Regulator
- Each manifold block integrates a precision needle valve for independent bubble rate control per tank.
- Features a quick-connect bubble counter on every outlet for easy monitoring and setup.
- Create a centralized, multi-tank CO2 system from a single regulator, saving cost and space.








