Review on Rhinox Stainless Steel Needle Valve for Solenoid Fish Tanks - Accurate CO2 Regulation and CO2 Adjustment with Rhinox C02 Diffuser Set by Christine Green

This is the only product I've found in this price range that actually works. I am using this for a home made CO2 system in a 13.5 gallon fresh water tank. All other needle valves I've tried that are in the same price range don't close fully and/or give precise control over bladder adjustment. It was really driving me crazy thinking I couldn't find what I needed unless I wanted to spend a lot more. As they say, thank God for this valve! It didn't break the bank and works exactly how I need it to (so far). It's been about 2 months since I installed it. If it starts to fail I'll come back and fix it because I know all too well how to find a good cheap needle valve. I use this in conjunction with a solenoid connected to a timer so I can turn it off when the lights are off to save CO2 when not needed.