I haven't installed the over the wall skimmer since I think it's a piece of ****, so the only intake is the intake on the wall under water. I want to buy a manual vacuum today when I go get my water tested, but I have no idea what I need to buy. Will I simply take some hose and plug it into the intake on the wall of the pool and connect that to the vacuum? If so, does anyone know what size hose I'd need to fit into that intake? Thanks.