Hi there :happy:
The tank looks good. Plenty of hides etc. Filter, and I think I can see that the spray bar is turned towards the glass to reduce the flow, which is always good. Little feeding area, awesome.
Just checking, how big is your axolotls? Just because very small ones don't do well with sand, and I'm guessing that even if it's fully grown the rocks are too big for him to swallow.
Do you have any pictures of your little one enjoying his new tank? We love to see pictures.