NEDOC, my Hybrid Stripers don't seem to stress. They are still feeding with no apparent ill effects. I rarely have 75 degree water.
That's great to know. I wasn't concerned about killing them. I just thought they may not feed as well. I'll still probably plan on shutting it down for 4-6 at some point in the summer to help control the carp population. But I can dictate it by the timing of the carp spawn rather than by water temps.