- where do you get your frogs from ? (tadpoles or adult frogs from the wild ?)
- your tank has definitely not enough height
- don't forget, by the time you put substrate, plants, a small stream (??), a small log to hide under in the tank there is even less space available
again, in my opinion, your tank is too small for frogs
(and yes, I am against catching adult frogs in the wild to put them in jail, get some tadpoles, let them morph, they wont know anything else than tank life)