Posted: Fri Jan 26, 2007 3:24 am
Well for digital thermometers (which are the most recommended here), you just dip them in occasionally, record and adjust the temperature accordingly, then take it back out if you wanted to. Some people just leave them in there, but if you're unsure of your turtles, then the first method is fine. You could also make some sort of cover over the probe to protect it if you really want to, such as placing it into a small piece of PVC pipe.
I myself use a stick-on thermometer, and it does a good quick job of telling the temperature, but if your turtles are sick or you're that kind of person that likes perfection, then yes, it is slightly inaccurate by 1-4 degrees. This is due to it also taking in the temperature of the air in the room (since it is stuck on outside), and due to the thickness of the glass shielding some heat from within.
They're both good choices, Digital for accuracy, Stick-On for ease (and price).
Hey hey hey.