It has gotten slowly worse over the last several months. Very gradual. I have been meaning to get back to the dealer to have them take a look, but honestly am dreading the response. My fear is that the dealer will blame our contractor that did the deck work, and the contractor will of course deny that his work wasn't level, etc.
We had all this done at the same time - the pool build, and the concrete deck was done and the pad for the spa was poured specifically for the dimensions of the spa. And I stressed to the crew that it HAD to be level. I really don't think it's the concrete. They did a beautiful job. (In my non-concrete-professional opinion.)
I have searched and searched online for what may have caused this and can't find anything. At this point I am REALLY hoping Bullfrog stands behind their product - because somebody had to be taking a serious coffee break when they made this particular tub!
Met with the dealer where we purchased the spa and I feel really good about it. I was there less than 10 minutes. As soon as he saw the photos he said "Whoa! That's not how that should look!" He is going to forward the photos and my spa info to Bullfrog and he said that "as long as they approve it under warranty you'll get a new spa."
Heard back from our salesman today - Bullfrog is replacing our spa. He apologized - his sales rep actually had the replacement approved from the warranty department within 48 hours of seeing the photos I sent - but our salesman forgot to let us know that.