u/Ok-Coconut-9100

I recently relocated my leopard gecko from a 25 to a 50 gallon and now I have an empty 25 that needs filled! I love insects and I have Madagascar hissing roaches but I have not yet had beetles. I would love to have a flower scarab or a Hercules beetle but I am unsure of if 25 is enough, what kind of setup I should have, and if I should have more than one beetle at a time.

The tank is front opening and is 30x12x16