Last year we started doing this "new technique" for filtering. But now i'm thinking it might be bad.
Run the sand-filter on "backwash" while also running the vacuum to pickup the really dirty parts of the pool.
Our thinking was.. to vacuum during this time, we would get the benefit of pumping the dirty water directly out of the pool. Is this crazy, or is it founded? Cause now i'm thinking that we are just re-dirtying the sand-filter.
btw: we had a really hard time last year keeping the pool clean.