OK, this may be a silly question, but here goes... I loose about an inch of water from my pool each day. The pool gets direct sunlight from 6:30am until 6:00pm. We live in Guam, which is at the 13th parallel, so our sunlight is more "direct" than in the continental US. I really hope I don't have a leak, I just got this house a month ago :grrrr: If I isolate the spa, it too looses about an inch of water per day. All my water tests such as CH and CYA have not changed with the addition of water every 2 days. Am I over-reacting by thinking I have a leak? I guess I can put on my scuba gear and grab a bottle of food coloring to check around the returns and main drain...