Added a fan today and my tank is now a steady 79!
Still haven't put my Radium bulb in...sorta scared to mess with the DE bulb...never had one before and right now I don't think it's hurting anything to run the stock one.
I have an ARMY of 5 hermits, 1 emerald, and 2 astrea snails doing a bangin' job on keeping my rocks clean.