Trying to familiarize myself with all the plumbing and electrical of our new pool. I've noticed our pool vac does a pretty poor job of cleaning the bottom, so I've taken it to the local store to be inspected. Another thing I've noticed is that the vac plugs in directly to the skimmer thru a hole cut in the basket. That isn't supposed to be like that, right? There appears to be an intake/hookup on the side of the pool where it probably should plug in, but when the filter is running, you can't feel any suction when you put your hand up to it. Is it clogged? Can I clear it myself so I can hook the vac up properly?