It's too much for asking the trout to be able to tolerate the temperatures of high 70's and low 80's, even with lot of currents and high levels of oxygen for longer periods. They can tolerate warm temperatures for short periods but they are investing too much energy to stay alive before they fell apart.
I can agree and disagree. The first Brook I had kept definitely wasn't a fan of any warmer water at all, even with high water movement. (my version of "warmer water" when talking about trout is **tops** 72°F. I have seen them kept in warmer water 74-76°F, but they didn't last more than a couple months. Much shorter than mine had lived, and I don't doubt he would have lasted even longer had things gone better) However the 2nd Brook, once he hit about 5", he tolerated just about any tank situation. I had one Fluval filter on the inside of the tank (forget the name), which was a bonus adding a small current to the tank by pushing the water from right to left. Even with the small current, it didn't seem to phase the fish. Color stayed dark, and breathing was regular. Feeding was constant, and for the longest time he was the dominant fish in the tank, nothing was aloud to eat before him or swim anywhere close to him. That was, until the Green Sunfish stepped up his game.
The first specimen was purchased at about 5-6", and the second was purchased at about 3". From what I observed by keeping the species, starting at a smaller size and slowly acclimating them from cold/high oxygenated water helps them to adjust to the new, warmer settings that they are placed in. I didn't get this chance with the first specimen, assuming just the water flow and added air would make the difference, but it proved to be wrong. Time is definitely a key factor.
Of course they do perfectly well in colder water
-Would I risk pushing 72°F with Trout in the aquarium setting? Nope. (Just what the basement was able to keep the tank at, dropping to 68°/69°F during the winter, which all three temperature are not really bad at all)
-Am I saying it is a better option than colder water? No.
-Am I saying I know more than everyone in the discussion? Heck no.
I'm just saying, that is my experience with actually *keeping Trout, and the **observations I was able to make as time went on. If you're going to keep one, start small, and start cold. But don't expect to catch something or buy something over 6" and just throw it into a warm water tank with high water movement, and expect it to live. That's just a given.