Although I have read posts throughout the site with the same problem, none of them seem to be quite the same problem I am having. I have a 14,000 gal. indoor plaster pool. I am currently experiencing air bubbles coming out of the return lines and cannot figure out why. It all started when I was done vacuuming the pool. Now all of a sudden there is air coming out of the return lines. I am curious to know if anyone has any suggestions. This happened Friday and it is now Wednesday. I tried vacuuming again today, and I was unable to get any suction in the vacuum line. My pool uses a seperate vacuum line. Thanks in advance!