c02 regulator problem

gnatp2

Greek god
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I have a Korallin Co2 reactor and have been having serious problem getting a constant steady flow of bubbles. I'm not sure what's wrong, but it seems that the flow rate works well for about 15 minutes then gradually slows to a halt. I then open the small adjustment valve on to regulartor slightly and it starts going for 15 minutes, then slows to a halt. I have done this over and over again until the small valve is completely open, yet it somehow slows to a halt. I'm sure that the MAIN valve is open (and has co2 in it) and I also have the middle valve screwed tight to about 15 psi.

Could it be the gold metal thing (sorry have no idea what the name is) that goes between the co2 tank and the Korallin unit that's busted?

Thanks,
Nate
 
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