great zoas, those look really healthy!
I personally won't buy a Potter, I'm afraid. I did some reading on those, and discovered their survival rate is terribly low: only 5% of those harvested live past 1 month. They have some very specific living requirements and are often stressed.
Sorry, I'm not bashing your purchase (they're darn pretty after all!!) but you should be OK as long as you have lots of rockwork for him to hide in and docile takmates who won't cause any undue stress. Apparently they're one of the most peaceful of the dwarf angel family. Let us know how he turns out!