So, My original fans weren't cutting it and were on their way out; so time for an upgrade after about an hour and a half the two new fans were in. They provide 29 CFM's Each!!! This is up from the originals at 16 CFM. You would think that this means more power, but they actually use less; 1.08W for the new versus 1.15W for the originals. They are a bit louder 26dB versus the originals 20dB but to get rid of the originals power drain and up the CFM while lowering tank temps well worth it!!! I will post pictures later this week.