We have a 20 X 40 X 32 inground, indoor, vinyl pool. I have the hardest time keeping the pH up. I consistently have to put about 4 lbs of soda ash in each day and it makes the pool cloudy. We use an automatic feeder for the chlorine and acid which are liquid feeders. We have an unusually large bather load through swim lessons. I am looking to improve the clarity of the water. Any suggestions? I was thinking of putting in a new filter and pump and adding a UV filter.