As the title reads, only have bubbles out of run and in the pump basket/basin when vacuuming. I've always had the bubbles in the pump basin, and assumed it's normal. But recently I started noticing bubbles from the return. It takes several minutes of manually vacuuming before they start. To initiate the vacuum suction, I take the lid off my skimmer and set it down in the skimmer box. After vacuuming I switch off the pump, set the lid back on top and no more issues. No more bubbles anywhere. I thought maybe the vacuum hose was leaking so I replaced it. It arrived today, and same exact issue. I guess it's possible the new hose has a leak, but I doubt it. There is no seal around the skimmer lid so I don't think that's the issue. I did recently replace the lateral umbrella in my s180t92s package filter. Everything seemed to go ok with that, but the problem with the bubbles started right after. Basically the first time I vacuumed after finishing. The only abnormal thing about the repair was when rinsing there was some bubbles in the sight glass and a little sand. Thoughts?