Another problem I noticed in the last few days is I may have a leak somewhere. I have an area at the edge of the pool that never seems to dry out. No one has been swimming in the last few days so it isn't water splashing out. There's not a lot of water, but it is noticeable. The area to either side is dry. I seem to be losing water faster than usual, judging by the water line on the skimmer when the pump isn't on. It looks to be about 1/2" since yesterday. How quickly can water evaporate? It's hot (low 90s) and sunny here. This is a 27" round pool.