I really like the role of devils advocate so here goes:
I have never seen a sulcata that did not pace the perimeter of its enclosure, save for those kept in great big areas (TOM).
Ergo, if you were to install a wading pool, it would behoove you to keep it several feet from the perimeter to avoid the inevitable trampling.
Maggie *hug*, but hopefully by now your starting to see some of the humor. Atleast look at it this way, see what a wonderful teaching opportunity Bob gave you to help advise and show new sulcata owners?
LOL sorry if I am laughing Maggie but Bob is sooo cute and adorable and he is a bad boy . I know you love him very very much, so I am sure if someone would want to put him in his SUV you would run after them with a basebal bat lol.
I've heard sulcatas can be frustrating, which, as fascinating as they are, is why I don't plan on getting the third largest tortoise species in the world for a pet myself. A friend of mine was tortoise-sitting a pair, and although the female was manageable enough, the male kept roving around. He trashed their wooden fence, ate their garden, and then started roaming the streets. They got him back and had to buy cinder blocks (like you had to, apparently) to keep him in. These tortoises also mated a lot, which my friend found disturbing (although I think that is very interesting behavior). My friend couldn't wait until the owner could take them back, which he eventually did, although that was only after some 3-4 months.
As for the pool, just dig a bit deeper and sink the pool all the way down into the ground. Then your sulcata won't be able to trash it anymore. Just a suggestion. Chin up!
Wow Maggie. Bob really likes to strut his stuff, doesn't he? Cute when they're little. As for your place to soak, I agree in having it more central in the yard. It should keep him from running it down as he roams the edges of his keep. Also I would recommend making a concrete spot for him to soak. We just had a little mudhole for RV to throw her muck onto her shell and soak when it would hold water. We walked out one day and found she was half way down her burrow. I wouldn't want King Robert to learn to dig quite so close to the wall.