I noticed today that my right hand jet (facing pool steps from entry point) is spurting air in busts of every few seconds. I have the adjustable jets. When I turned the knob towards the other jet it got worse. I am needing help determining what my problem is. The jets in the actual wall of the pool are not doing the same thing. It is just the one jet. Of course the other jet had air in it when I adjusted it, but it quit soon afterwards. My pressure gauge is normal. Help...