Ken, I also have assumed if there was a fish kill you would find them floating and since I have not since the fall of 2002 when I found 20-30 cats and BGs and one blue gill shortly after the 2003 stocking I assumed they are in there. So I have been asking around for 2 yrs whether all dead fish will float, sink or a combination and I dont think I have ever recieved an absolute answar? If I have had a major fish kill and the dead fish indead all float then I dont think I had one but thats the million dollar question?
I have also thought about prediters eating the dead fish but with the pond semi close to the house we get very little wild birds landing on the pond. I have seen a blue heron I believe once or twice a year for the last 2yrs. you can see most of the pond from the house and I always scare them off.
Is there a way to post a picture here? Would that be helpfull??