George,
That temp took me by surprise as well. We have been running mid-80's during
the days and lows of 60's. I will check into the pump. There is a
pre-filter surrounding it. Maybe it needs cleaning.
With appreciation,
Ray

That temperature seens a little high to me. Is there any reason why it
would be
so high this time of year? Do you have a pump that is overheating? I
live in
Kentucky, and my water is running at about 70 degrees right now (but then,
the
pond is nearly 4 feet deep). I have never seen it reach 80, even in the
middle
of the summer.