Well, the first day I used the regulator it was putting out about 2 bubbles per second in my bubble counter. The next morning it started back up with the light but the bubble count was lower than 2 bbs and erratic. I noticed a hissing from my crappy bubble counter so I removed it and started out slow so not to overdose. I kept an eye on the PH all day and I got it dialed in good so I left it.
The next morning when the regulator clicked on with the light, it was not working...no bubbles. I gave it an hour but still nothing so I tried to turn it up a bit and it began to work so I kept an eye on it but as the day progressed, it got faster and faster and it began to bring the levels to high, even when I was turning it down after every check so eventually shut it off so the fish did suffer.
The next morning when the regulator clicked on with the light, it was not working...no bubbles. I gave it an hour but still nothing so I tried to turn it up a bit...still nothing, not even with full on. That is when I removed the regulator and saw bubbles from the hose so I cleaned the diffuser with a bleach water solution and flushed it with Prime and clean water before assembling the system again and still nothing not even full on...at this point I was getting very frustrated. I finally removed the regulator and reattached it and it began to work at that time so I kept an eye on it for the remainder of the day and got it dialed in again. However, when I went upstairs to go to bed, there was no bubbles. I cussed it but left it alone.
The next morning I got up early to go out to breakfast, before the light and regulator came on. I figured when it came on it wouldn't do anything so I didn't unplug it but I should have knowing it was not working right and I wouldn't be around to monitor it. That is when it must have came on and been way too high. By the time we got home at around 11:30, the fish where dead and the diffuser was bubbling like crazy. I shut it off, mourned my fish and cussed a bit more. I cleaned the tank, replaced half the water and tested the PH, it was still yellow so I left it alone and wrote to this post.
Sorry that is so long winded but I am trying to be specific as to the events. I am so confused by this regulator issue and ready to just throw in the towel on this tank. If the plants and biological filter dies, I might as well...hundreds of dollars lost.
By the way, it is an Azzo regulator and I got it from Dr. Foster Smith. I have a check valve and it is on correctly.
Any help would be great, I am not a quitter but this has got me so wound up, stressed and disappointing.
Thanks again to everyone that offers some assistance.