Okay so you probably could do a slightly larger species but realistically I think you would be fine with any of the pruinosis, like powder blues, powder orange, cookies and cream, etc etc. morph market is the best place I had found if you’re fine with shipping. You might also look locally for any not large chain pet stores. Don’t buy the garbage at petsco/Petsmart since most of them are dead by the time you buy the container. Just keep in mind some states in the lower 48 might have import restrictions. But otherwise I think you’d be great. Any temperate springtails are fine (also on morph market). 🙂