A cloudy pool condition may be caused by several factors. The problem may be one of chemistry or one of filtration. If it is a chemical problem, it is most likely the visible presence in the water of chloramines or calcium. If it is calcium, usually lowering the pH will correct the problem. If neither of these procedures helps, a complete water analysis usually reveals the problem. If the problem is one of filtration, no amount of chemical balancing will help. Before adding anything, check the filter to insure that it is functioning properly. A defect may be allowing dirt to pass through the filter and back into the pool. In general, problems such as these can be minimized by the correct use of diatomaceous earth, even in a sand filter.
