I am new to the whole pool concept. I just bought a house that had a pool with a sand filter and am trying to get it ready for use. The pool currently has some dirt/dead algae in the center. I am trying to vacuum it up, but it seems to always cloud the water up. I can see the water returning to the pool is a little dirty when I am vacuuming with the filter control set to filter. Therefore I backwashed until the water was clear, then rinsed, waited a little while then vacuumed again. I set the filter to waste. Now when I vacuum the dirty water immediately returns to the pool as soon as it is vacuumed. It seems like some hose or something is hooked up wrong, because I didn't think waste would return to the pool. But if backwash works properly out the waste hose, I don't understand why waste wouldn't. Any help is greatly appreciated.