Thanks for the information. I checked the temperature of my tank and it was reaching 87 at the end of the days when the weather was on the warm side last week. That is a bit toasty, I suppose, especially since the temperatures were only getting down to about 84-85 overnight.
I've got a couple small computer fans blowing on the sump and the temperature is now 79-81 for the past two days. The elegance is opening up a bit more, and some fuzzy mushrooms have expanded more than they have in the past. I'm buying a bigger fan tomorrow at Radio Shack and that should knock the temperature down a 1-2 degrees more, hopefully with good results.
I won't say I'm out of the woods yet by any means, but unquestionably this has been a step in the right direction.
Mark