We had an earthquake here last week (5.3), and a few hours after the quake I noticed my spa water level was about 6 inches below normal. I let it go just to see what happened, and before I went to bed the water was at the level of the returns . Thankfully, the pool wasn't affected. I'm going to do some minor troubleshooting this weekend to see if it's easily fixable, but if not, a call to the insurance company may be in my near future. I'll be sure to post some pics of the broken piping once it is found. Wish me luck!