Frogs should have floating plants that aren't above the water. Clawed frogs and dwarf frogs both like a hang out area where they will sleep occasoinally. My clawed frogs used to sleep on the plants as a "hammock" so they wouldn't have to move to get air.

If you have Silurana tropicalis, the TRUE "dwarf clawed frog," they do haul themselves onto a floating dock to bask.