Greetings,
I decided that I don't want to live with the almost 2 inches out of level that my spa sits. It is on a concrete pad, but the pad slopes a bit. I don't want to install anything that is permanent (I don't want to pour concrete or anything like that.)
I have thought about building a 2x4 deck that sits on the concrete pad, and raise up the low end, and then make sure that it is fully supported every foot or so. This would make a nice sitting area, and could be removed without damage to the concrete pad.
Another option that I want suggestions about is to: lay down some landscape/filter fabric. Pour sand all over it and set the tub on the sand. Wiggle the tub about until it sits level and firm. Remove the tub, fold the filter fabric over-top and replace the tub (the tub weight should keep the filter fabric in place.) This method seems like the easiest and most affordable and least permanent. Do you think this method will work OK? If I do this, what is the most important, getting the footwell area fully supported, (I know that it MUST be supported) What about the area under the seats? If I do the sand thing, and use wood block around the perimeter, will it work OK and provide the needed support?

Thanks,
Stuart

PS, I checked at Lowe's yesterday and priced all the wiring and the GFCI pack. I think I can have the electrical parts for less that $300.00 (I will be making a power run about 85 feet using 6/3 with ground and installing it myself) My county does NOT require permits, inspection, or a licensed installer

The easiest way isn't the better way, I'm afraid. Any form of loose material, be it gravel, sand, or even earth, will shift and settle over time. Your best bet is to make a small elevated platform out of wood, like a mini free-standing (floating) deck. Use 4x4's for the legs, just as you would for a standard deck. A 6" rise at the smallest portion would feel comfortable as a step up to the tub, and would also work to showcase the tub as well. Since the tub is designed to be freestanding on a surface, don't worry about supporting the seats or such separately. Just build your deck, and place it right on top!

Enjoy!