Thanks for reply,
Yes I did realize the spring water had little oxygen. Brook trout max temp is 65-67f . Rainbow trout is higher at 70-72f, therefore easier to keep. A lot of local ponds with rainbow have been loosing fish with these high temps, no aeration, smaller ponds and bigger fish, 2+lbs. My brookies are smaller at 9-13” but hopefully will put some weight on before Christmas.
So, warmer water, no aeration, less oxygen, cooler bottom temp.
Or, Slightly cooler water, aeration, more oxygen, warmer bottom temp????
