Review on 🔧 FZONE Pro Series CO2 Regulator: Adjustable Output with Solenoid & Precision Needle Valve by Christine Chance

I purchased a FZONE Pro Series two stage CO2 regulator for aquariums with variable outlet pressure, DC solenoid valve and integrated precision needle valve and bubble counter to replace my old FZONE regulator. I have 6 tanks with plants that require CO2 so I needed 4 more manifold blocks with bubble counter and needle valve. It was relatively easy to attach to the main unit. However, what it doesn't tell you (no instructions on both the FZONE main controller and the sub manifold) is to remove the 2nd manifold from the main controller (the controller comes with 2 manifold blocks). Install additional manifold blocks and reinstall the manifold that was originally removed. That's all. Even with 6 manifolds this unit is very strong and didn't knock over a 20lb CO2 tank. Why not 5 stars? The price of $39 seems a bit steep for something made in China. Another problem is that the needle valve timing is not as accurate. After adjusting the controls, I was able to keep it at 5/6 bubbles per second.