Quote Originally Posted by Jonny2184 View Post
Yeah I used to use 100, then I went down to 60, and now I'm all the way down to 40watts! So I'd say "yes" that would be tooo much heat, unless you can raise it up some! or you attach a thermostat to it... that might help!
Good Luck!

What are your temps with a 40 W And also is that with a 40 gallon?