I recently set up my 55 gallon aquarium for 2 angel, 2 discus, and I bought 7 cory catfish from a friend of mine. I am not too knowledgeable with ID'ing the cory's yet. I was wondering if they will survive, and be happy in 80-82 degrees with the discus. They are swimming around fine right now at 81 degrees. They eat a lot of food but I just dont want to wake up one day with dead cory's.