His canopy is fixed.

I have put a large box fan on top of my open canopy, and even with the 400s it keeps it cool enough. Overnight though there is a huge temp swing, but I haven't lost a coral in this tank yet. Temps get low overnight, down to 71 degrees. I'm going to place my heater in the sump and set it for 71 as a backup since it's getting cooler.

5k, ha.