We put in our pool ourselves last summer. Through this site I have learn much and been able to have the clearest pool for about a week since this adventure began. Now here's the new problem - our pump (hayward 1 1/2 HP) begin making a horrible loud noise. My husband, after listening and listening, decided the bearings have gone bad. I have called around this morning and been told I have to buy a new pump. If that is true, then we will do that, but want to understand why and how this happened in order to avoid a repeat. Any ideals? One other thing my husband thought might have been part of the problem is he build a small wall behind the pump that would impede the venilation for the pump. Would that have caused this? Anyway, thanks!