Will do going to wait and see what my tank gets up to with ambient temps in the house at 76-77 might not need a fan but we will see. I have a small 6" clip on fan that i used on my biocube when I had that going that would get the temps down 2-3 degrees but evaporation was a PITA to say the least and I didn't have an ATO in 2005. Researching ATO's looking at the reefbreeder Prism right now.Let me know if you find something. Looking to getting one as well.