You guys are always more than a wealth of knowledge. First time closing pool. We blew out the returns and skimmer u til we saw a mist. We closed the skimmer line and opened main drain and put shop vac blower in. We don’t notice bubbles. Could this be that the blower isn’t strong enough? I’m needs to blow for a long time? Or perhaps we have some valve open or closed that’s not supposed to be? Please help I’m so scared to do it wrong. I must add at one point after blowing we took hose out and water then came out. So weird. We just aren’t seeing any bubbles as we expected to see. pic to show our set up.