I bought a Hayward AquaCritter auto vac. When I read directions on setting it up, I just can't understand. Of course, since mine is an Intex pool with over the wall (not in) skimmer, the instructions don't really apply. Do I need an adapter or just bypass skimmer and attach to sand filter? Help, please, I'm tired of vacuuming with the hand vac that isn't cutting it.