Fish's new tank project

[Fish]

That's a good point too. I may have been lucky that my nano was in a large government building with air contitionioning too. ???
I bet I would see more fluctuation if my current setup was upstairs in my house where the temperature fluctuates a lot more than it does in the basement.
Thanks for the great input on float switches - I'm sure it is the best way to go in certain applications.
Cheers,

- Chad