I installed CoralVue BH-1000 HOB protein skimmer and it worked well for 2 days. I had turned off the switch for some reason and when I started it again, it stopped producing bubbles. I initially thought it might be the air issue and tried many different things but nothing is working out. Any help in fixing the issue is appreciated. Attached 2 images show that there are bubbles in the skimmer but it is not going to the collection cup.