Those are very healthy and gorgeous Pacific Chorus Frogs Pseudacris regilla.
Sierran Treefrog Pseudacris sierra is just an alternate name.
If you make a living vivarium you shouldn't have to clean the enclosure at all. These frogs are semi arboreal and are not aquatic except to breed. They need land and branches to climb on. Climbing to the top is normal. If you make a water feature they will swim but the enclosure should not be all water. I have some pics of these guys in my albums. Jace has some good setups as well for Pacific Chorus Frogs.