Sasha, he's probably sleeping in the water bowl because he needs more water in case he wants to swim. How small or large is your bowl? Why don't you have water in your tank? And you put potted plants in that were meant for a fish aquarium? Yeah, sounds like your frog would like more water to frolic in like mine do. If you put water in tank with added land areas you might see a difference in your frog. Then you would not need a fogger or even a hood light. Something must not be making your frog happy. He might be depressed over being in a bowl of water.