The Petland in this area is so bad. They mistreat their animals.
But I know that there's good and bad with all the chains.
Frogs can't be mixed. It's really hard to find frogs from the exact same region, so they would have different requirements. Also, frogs secrete toxins that are harmful to other frogs. Mixing frogs will lead to problems with cross-contamination. Also, the White's might try to eat the fire-bellied toads! Also, the toads are semi-aquatic and seem to like to spend a lot of time in the water. White's spend much of their time climbing and need a lot of ventilation.
I think there are some fish you can put with some frogs, but it's not something I want to try, and I'm unsure of what can mix with what.
The Petland here only has like one or two types of frogs, so I'm sure it's exciting to expand the amphibian section.
I hope you find one you really want to keep.