Kegger,
Do you have any pictures of the dead fish?
Anything look like a red rash on them?
Any dead minnows?
(BTW, what you thought were shiners, they are actually Bluntnose Minnows)
Not quite buying the Ammonia theory yet because that is an equal opportunity killer and should have had an effect on every species in the pond. May just be a disease of sorts.
