I am wondering if anyone knows what size motor (pump) I should use for a Hayward s160t sand filter. When I bought the house, the pump worked the first year and then crapped out. The labeling on it was so sun baked, I could not read anything. I knew it was 120v circuit, so I just bought the largest pump that would run on that circuit (1 and a half horse). I have not been able to get crystal clear water since. I just replaced the sand in the filter and there was only about 100 pounds in it, I found several pool sites that said it should have 150. Also 150 brought it right to the top of the clam shell. Well, when I first backflushed it, it shot a bunch of the sand out the waste. I'll bet it's down to 100 lbs. again inside and I still can't get clear water. Any help appreciated!