I have intermittent bubbles rising from the jet opening shown in the picture. The bubbles are coming from the small clearance between the pebble tec surface and the gray jet housing. I tried to capture a photo as best I could of the bubbles. I should add that I also have intermittent bubbles that come out of this same jet as well. This particular jet is fed by my main pump. I don’t seem to get air coming from any of the other main jets. Given that it’s bubbling should I be concerned? And is so, should I try to repair this using something such as JB Water Weld? I already suspect that I’m losing water faster than normal evaporation. 
