Ive tried to soak my sulcata a couple of times since I got him but he keeps pooping in the water. I changed the water twice this time and both times it was like he was pooping on purpose. Am I supposed to just let him soak or continually change the water? Any advice?

Change the water. A lot of times, being in water helps them to go. it's a good thing.
He'll run out of poop.

When did you get your sulcata?

I have only had him for about a month maybe. I thought maybe he was stressed out in the water and thats why he kept pooping. I didnt want to stress him out. I will only have him for one more day though. Im sad to say I have adopted him out to a great home. I "rescued" him from some people who werent properly feeding/housing him, but I still dont have enough space to accomodate him.....but thanks for the help