Well, I will need to ask you do you really need an exact temp of your tank?
For me, I just buy one and monitor it's reading. say 30 degree (not necessary accurate). as long is it hover between a couple of degree it is okay, but if it shoot up too much then i know something is seriously wrong.
The point I am saying is that it is use to montior the water temp, but not to get exact water temp.
Bookmarks