A kuhli can only live in 90F waters temporaraily, if kept permanantly, it's lifespan will shortenbassbone said:My single kuhli is in 80-82 degrees F. Sometimes gets higher in the summer, I don't have AC in my room and it can get up to the 90s during the day.
(Deviation: Yes, I know he needs friends. All his friends jumped from a smaller tank they were in so I threw the survivor in my main tank in desperation to keep him alive.)
Had him for maybe a year or more now. Real snail killer, always has a new snailshell graveyard depending on where he's moved, and he's bigger than any other kuhli I've ever seen, and I got him at only 1". I would say high temps are just fine.