Question about tile

[Dianne]

But what if you need to move the tank later? Won't it be too heavy if they're stuck in?

Also, are caulk and grout dangerous at all for the dragon? Like chemical-wise?

Didn’t realize you were talking about a glass tank versus wood cage. Yes, loose fit would be fine because you can remove to clean between and under. Assuming it is water tight, you wouldn’t have any leaks to the furniture/shelf the cage sits on.