john wrote Is it because of the rain? or the weather (?) (the
temperature drop about 10 degrees)

I'd vote for temperature drop.
And starvation. The algae out stripped the pond's
ability to keep it fed.
Of course it is not totally gone and has newly dead
algae to feed upon.
Stuff lots of plants in your new pond.
Don't get carried away and add lots of fish.
Avoid over feeding the fish once you get them.
Buy a gazing ball and a couple decorative garden stakes to appease the local
garden gods.





k30a