Temperature questions?

[justinl]

Im going to have to agree with Konk. Think about the natural ocean. Temperature can vary a bit over depth and area but temperature always is constant and fluctuates virtually not at all throughout 24hrs.

Krazykuch, where do you keep your tank if you don't mind me asking? Is it by a large window or a heating vent? I think 7 degrees is quite a fluctuation in a single day.