After all my efforts to keep my prized pond fish alive last winter inside, taking them from the pond in October and putting them in my aquarium, I decided to put them back in the pond this summer, thinking they'd enjoy the freedom and extra space. They were alive and healthy and happy indoors, but I thought they'd like the air and sun outside. Wouldn't you know we had a bad hailstorm in late September that resulted in a "pond turnover." Last year when we had a turnover, the fish survived fine, but I didn't realize it was a turnover. I thought sediment from the roof had fallen into the pond and turned the water gray-- I thought it was auto exhaust and pollutants and worried about the health of the fish with this gunk in the water. But no, this year, my beautiful "Tigger" washed over the side. I was reading that the cold hail can hit and kill a fish near the surface during a turnover, or that, more likely, the sudden cold shocks the larger fish in the pond to death, or that they suffocate from the gunk in the turnover displacing the oxygen in the water. I had never heard of such a thing. I won't ever be putting my fish out in the pond again. I'll keep them inside forever. I had no idea this sort of storm danger lurked. Has anyone else lost beloved fish to pond turnovers? You live and learn. And, of course, Tigger had to have been my prettiest fish.