I have a brand new pool put up about a month ago. We didn't add chemicals for about a week. The ph was low for awhile then I brought it up. The entire time I have shown no chlorine on my test strips. For about a week there has been a settlement on the bottom that makes it cloudy whenever we swim. It takes about 12 hours to settle back down, then it is clear. I vacuumed some of it out but some still remains.