I know a lot of you have garden ponds, so wondered if you could answer this
question. Yesterday I discovered approximately 80% of the tadpoles in my
pond had died - they were all floating just under the surface. It was
strange they had all died at once I thought. The pond is new and has few
plants in it, but is reasonably clear. It has lots of those tiny floating
green leaves on the surface and one bunch of goldfish weed dropped in. It
was definitely over populated with the tads and I think there would have
been a lack of food. We have had very heavy downpours over the last few
days, could this have contributed - hammering down on the surface? As far as
I know, there is no chance the pond could have had chemicals washed into it
from the land.

Thanks.