Hello all. I'm a new member to this group. I started CO2 injection in my planted tank but have seem to run into a problem with my Milwaukee CO2 regulator. The CO2 tank is a full 10lb canister. When I hook up the regulator, the left gauge stays at zero and the right gauge working pressure is cranked to 20 kg/cm, and needle valve is at 1 bps. The CO2 regulator is brand new out of the box too so it should be in tip top working order. Why is the tank capacity reading zero? Any help is appreciated. Thanks.