If a fish dies in the pond and you don't find it, how much of a problem would that be?
I have a fish with dropsy, and haven't seen him for three days. I'm afraid that he's hiding in one of the milk crates I use to hold my plants. If he dies in there, he won't float to the surface, and I won't be able to net him out.
He's about 15" long. 1000 gal pond with pressurized bio filter at 950 gph.