First off you need a pond fogger I got one of these
http://www.ebay.com/itm/12-LED-Mist-Mak ... 0622678868
You need a way to make this float, a float can be purchased but I made one from a PVC bushing (4x2 inch ) easily found in any hardware store. I used 2 inch pvc as the fogger I got fit nicely inside. I secured it there with a screw. This way you can just fill the bucket up once and a while and the fogger is always at the perfect operating depth.



Then you need to force the moist air through a hose, so I just used a computer fan wired into an old cell phone charger.


I have mine on a 20 lt bucket.

And the added bonus of the LEDs on the fogger is it looks sweet at night..lol

I hope all that makes sense
Toby