i am unfamiliar with this type of fogger, what physical process is used to create the fog? (i suspect its ultrasound but im not sure).

the ultrasound foggers i know are typically partially submerged and fed by a body of water where the water surface is only slightly above the fogger, so the water pressure is minimal. like 5 millimeters or 1/6 th of an inch of water.

i can help when i know more about the device and the physics behind it.

also, is it an overflow problem, or is the fog condensing and then dripping down?