Review on Aquarium CO2 Regulator with 12V DC Solenoid - Large Dual Gauge Display, Bubble Counter, Check Valve - Fits Standard US Tanks - Accurate and Easily Adjustable Flow Meter by Natalie Wright

This controller is poorly made; The gauge leaks hence the C02, the connecting nut on the oversized bottle and hence it has its own wrench to tighten the regulator, the pressure regulator with a knob like most regulators but a large hex key so don't lose it. I bought it in September and installed it in mid-October and fiddled with it for two weeks to get it working with my Milwaukee monitor only to find out the regulator was faulty and couldn't control the CO2 leak. Oh yeah, if you're using a white plastic washer, it comes with an o-ring trash.