As long as hes not stuck i guess its okay? When i still had my Congo puffer, i would at times catch him resting ontop of one of the leaves of the up-rooted anubias plants in the tank floating around with the current while just laying there quite happily watching the world go by...
The tank has some major water movement
38 bow front with a 75 gallon aquaclear filter
I have a couple African dwarf frogs that are really digging the lilies to