Well I thought maybe I had a pool leak. So I did the overnight bucket test and the water level remained the same. It seems during the day, with sun fully hitting on the pool the water level seems to go down. I think it is caused due to evaporation. The reason I think this is I have a Koi pond that is covered and does not get any sun, but is losing water slowly. It does not seem like a lot of water though. During the winter though, the water level never really went down at all in the pool and if we got a big rain storm or anything I would have to drain the pool. So maybe I am just paranoid and really do not have a leak, but just worried. I am trying something today. I put some water in a bucket outside of the pool in direct sunlight and I am going to see how much water it loses.