I've never had an adult turtle---my first and only, an eastern painted, is still just about a year old---but I think the only real differences in care are feeding (more frequent and more meaty for young'uns) and tank size. From what I can see, it looks like a good setup. Good idea with the pebble pile for a basking spot, just make sure there's nothing small enough for the lil guy (or gal) to swallow. Congrats on your new cutie!