Join Date: Apr 2010
Location: Harrisonburg, Virginia
Eldachleich, I just wanted to let you know that you certainly aren't alone in the "no climate control club". XD Granted, the temp in my room maxes out at around 92, but the issue is the same.
In the short term (a few months out of the year); so far a steady temp of ~85F hasn't done any obvious damage, with exception to some mosses that don't seem grow as fast in higher temps, and some melt on crypts when the temp slipped up to 90. As for the fauna: I keep labyrinth fish in there, so they don't necessarily rely on oxygen saturation, but the amano shrimp & various snails seem to handle it okay as well.
Predictions for the long term are a bit more difficult. It really depends on the species that you keep since some fish and plants are more well suited for higher temps than others. In theory prolonged exposure to higher than optimal temps could cause shorter longevity, since the enzymes used by a particular species often have optimal working conditions which include temperature, but how much of an impact that would have could vary quite a bit from species to species.