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Is the tub losing water at a quick rate? Tubs do lose water but it should not be significant amount in say 1 week.
How high off the ground is the concrete slab? Is it flush with the ground or does it sit 3 inches high? How wet of an area did you put it in? If you have a sand box then I would think water shouldn't be around but clay - yep.
If you open up your sides - feel the foam to see if it's wet. Shut the tub down, let it sit there for a week and see if it drained itself.I had a leak as I noticed that I had a wet side on my tub. I also had to add a lot of water (2 to 3 inches) to the tub every few week without anyone using it. Since I kind of knew the side I decided after a very long while to takle it, let the tub drain to it's lowest level so I knew how high to look and it turned out to be a stupid easy repair. Just a FYI and I believe most people do not think about leaks/repairs but you should be able to get to all 4 sides of the tub and also be able to remove the panels if need be.
"My Artesian Spa Dealer says "Artesians don't leak" I'm really crossing my fingers hoping he is right. I'll be opening up other panels when it gets slightly warmer."hahahahahahahahahahahahahaaaaaaaaaaaaaaaaaaaaaaaaaaaAnything, that holds water can eventually leak. ANYTHING! This includes ANY spa, with all it's plumbing and equipment and everything glued and attached together. In fact, I can GUARANTEE you that eventually, EVERY spa will start to leak.
hahahahahahahahahahahahahaaaaaaaaaaaaaaaaaaaaaaaaaaaAnything, that holds water can eventually leak. ANYTHING! This includes ANY spa, with all it's plumbing and equipment and everything glued and attached together. In fact, I can GUARANTEE you that eventually, EVERY spa will start to leak.
I vote for leak