Does it matter if I put my return water flow to the lower port of the pool? Hubby wants to use the higher port for the new through wall skimmer and use the existing lower port for the return water flow. I feel there was a good reason the water returned at the top of the pool and I had no problem keeping it clean because the water moved constantly. Will it be just as effective if I put the return flow lower in the pool further under the water level?