I just figured it out. I keep the working pressure at 20.
I've had very few problems with this setup over the years. One of the problems was me putting salt water in the bubble counter. For whatever reason, it didn't like that and the bubbles kept slowing down and stopping.
From then on out, I always used DI or distilled water. However, right before I went on vacation, I took some water from my DI water resovoir and put it in the bubble counter. I assumed it was fine. However, I do mix salt in that same vat.
I emptied that water out of the bubble counter and put some distilled water in there. Now it is running fine. I guess the DI water in my vat must have had enough salt contamination to stop the bubbles.
Thanks for everyone's help.