Gary - Yes Perhaps. I know fans help with my gas diffusion. LOL.

Anyway....

I just know if the fans do not do the trick for me then either I quit doing Acros in my tank or a chiller is in the future. Oh and the fans I have are not small fans they are fairly large and are moving some air. One runs all the time and the other comes on when the lights come on. According to one of my digital thermometers and min/max memory, my tank is now only varying 2 degrees over the day, 77-79 and that is a whole lot better than last week 79-87 YIKES!.