I had sterbai live over 10 years in a tank I kept at 24c. I find it interesting how about every decade in the past few, suggested temperatures for all fish seem to have crept up, for no identifiable reason. It isn't based on nature, even with climate change. We seem to have a warming trend in fishkeeping, with sad results for fish.
I avoid fish like Discus or rams, because of their high temp needs. But I see people keeping tanks at 80f, and I wonder if they have stuck heaters.
I think sometimes the word "fish" is a bad one. It's so general. When I see a Corydoras I have never kept before available, the first thing I do is reference 3 sources for its temperature needs. We can generalize about fish from the same general region, but we still have to respect individual species needs.
A friend of mine used to keep and breed a Cichlid species found at over 40 degrees celsius, and if I choose to keep any of my local beauties, I need to figure out how to give them a few dark months at 3c or so. Corys are on a tighter range, but you'll lose Scleromystax kept too warm. We need to go back to seeing what the fish live in in nature, and to respect that.
No cheating. Our convenience shouldn't be the deciding factor.
