In the future it might be wise to fix the enclosure well before buying a pet frog.
It will be best for the animal when it can settle in a well set-up tank instead of being subject to a lot of fiddling around while he needs to settle in.
For now, it's looking better then before.
My guess is the 30 degrees Celcius as a lowest temperature was somewhat high,
besides i think you might cover up part of the top lid to keep it a little more moist,
those critter keepers don't hold humidity up in my experience.