ditto on the sterbai's. "regular" cories have trouble over 78 and I've noticed more barbel damage when temps went up. I recently sold all of my cories because my tank gets too hot for them in the summer and they were miserable. Much less active, faster breathing, and reduced barbel length. I had sterbai's, though, and they were fine. They're expensive, though. $6-$10, depending on local availability.