Temperature control

[Treebeard]

I am about to go through my first summer with a reef tank and already I am concerned about my tank temperature.

My tank is on the main floor and my sump is in the basement where the temperature is much cooler which helps reduce the temperature a bit.

The frozen pop bottle idea sounds great! How well does it work?

Originally Posted by Aquattro

So, summer is here (ok, not so much) and this is the time of year people drop in looking for ideas on temp control. What is everyone doing, or planning on doing in mid July when the days hit 30?
chillers, frozen pop bottles in the sump, alternate lighting schedules, etc?

Let's hear all the great ideas, and any experiences on past "great ideas", thoughts on what is acceptable, what is not for temp swings.

Go on, heat it up!