Bristlenose would prefer cooler water, Eighty degrees is near upper extreme for this fish .
Once drew the ire of some Discus keeper's when I suggested that they give same consideration to tank mates that they often place in their warm water tanks, that they do their Discus, (ie) cory's, tetra's , plecos.
German blue rams enjoy and seem to do best in soft acidic water, a bit on the warm side of 80 degrees F.
Higher temps are a bit too warm for many tetra's, cory's, and some plecos but it doesn't always matter to some.
Not sayin you are one of these ,,just sayin.