I have my oldest in a ten because I already had one available, but she seems to enjoy going for a hop around the tank now and then in the evenings so it works out for her. Especially after I painted the back black with acrylic paint.

My younger frog is in a medium critter keeper on foam, but TBH I'm thinking of switching to one of the All-Access tubs that are so popular with the crestie community for him. I think having almost all the sides opaque may make him more comfortable.