how does that work?
simple answer - you push the "on/off" button and put the metal probe in water
fancy answer - can be found
here
where do u set it up at?
-all of my tanks have either egg crate, screen or plexi tops.. so i just stick the probe through a hole and wait and watch... it takes about 20 seconds to give a reading..
im a little confused with the picture.
-its my hand holding the thermometer.. i work with my hands and so my hands are pretty rough.. the "dirt" is mostly grease and such that is in the cracks in my hands.. it never washes off.. (stay in school kids)
as for where to get them.. sometimes homedepot/lowes has them in with the fancy electrical tools (aka the stuff in the cage).. they can also be found online at amazon.com/ebay.com/google it..