CO2 Regulator Pressure Drop

[lucius]

I have a double gauge CO2 regulator and I have it outputting to two fish tanks through two different needle valves.  I decided to increase the bubble count rate for both of them and I noticed that the tank pressure gauge drops from 700 to 200 psi when I'm injecting CO2.  Once the solenoid turns off, it goes back to 700 psi.  It wasn't doing this with the lower bubble count rate.

Is this normal? 

[charlie]

To the best of my knowledge  that is not normal . I have the same regulator with 2 needle valves and the bottle pressure does not vary due to increase bubble count.
Do you have another bottle with gas?, if so switch the bottles & observe if it happens.
Errol

[exv152]

What do you have your working pressure, the right-side gauge set at? The only other thing I can think of is that you might have a leak somewhere. Could even be between the regulator and the bottle. Did you use a new seal when putting the reg on the bottle?

[lucius]

I sprayed Windex on all the joints but can't seem to find a leak.  The only thing I did was move it a few feet to its current location. 

Anyways, turning the knob on the CO2 canister completely off and on again seemed to have done the trick.

[charlie]

Strange ! but glad it worked out.
Errol