Is this soil o.k.

[Frogman97]

Can you get these substrates at petsmart?

[DartEd]

Unfortunately I don't believe you can. Most places mix their own and sell it. I'm not sure what product pets art carries that might be safe for your frogs. I would post that very question in the appropriate species section to get an answer from someone familiar with your specific species. Sorry. I wish I could have been more help.