Answer:

It might be time to partially drain the pool (lower the level) and add fresh water, especially if this has not been done for several seasons. Another idea is to add a clarifier chemical to see if that is helpful. Clarifiers assist your chlorine to clear up some causes of cloudy water. Also, make sure your pH is in the ideal range of 7.2 to 7.8. This is very important to the clarity of the water.