I agree also, but I think that we have all learned that there are no guarantees when dealing with live fish or Mother Nature.

2cat you've got to get us some pictures somehow.

Now might be a perfect time to let some natural predators into the pond to help keep down any successful recruitment of unwanted fish. The fishkill set up the situations to regain control, perhaps.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."