I recently purchased a fogger for my MHD (since I wasn't allowed to mist him for 10 days after his surgery) to help keep his humidity up. All it has done since then is keep his humidity at 50% and flood the bottom of the tank. It creates fog just fine, but none of it seems to go up past the bottom half of the tank. I have it in a small container with a slotted lid (since I know the ultrasonic ones can be dangerous to the touch) until I can get my waterfall fixed. Am I doing something wrong?