I filled my 25,700 gallon pool with our well water and my water is beautiful. I did have it tested for metals at the pool store and I didn't have any. It took me about a week and a half. I let it run for 2 or 3 hours and then turned it off for an hour or 2. I didn't think it would ever fill. Probably the last 2 days I let it run more as I was anxiouse to get it filled. I didn't run it when we were taking showers. Hope it works out. Sharon