The LFS guy told me that the reason pandas were selling for 7.99 was because they need special warmer temp. tanks, "somewhere around the 90s".
Lol anyhow I was doing some house repairs and had to move my main tank to the garage. But my water in there stayed 80 degrees and the bronze cories stayed in there for almost a year. Never lost a single one, besides one that jumped out. But they're all back inside now. A 78 degree tank for bronze cories should be no problem.