Dan,
That is good! Your best indication will be in late September before things cool off, and eventually the pond turns over, probably October (depending one where you are located.
I know this partly because we have lakes that are planted with trout in my area, and the the peak time of stress is in September when D.O. will be at it's lowest level for the year in the deep water. On one lake I've seen trout come up to the surface around Labor Day, but they become severely stressed and develop disease and fungus problems.
