It's been a while since I posted here, but just an update:

I got two filters/pumps installed in my pond. It took a while, but the
water seems to be a LOT CLEANER now, and much less smelly. And I'm sure
the fish appreciate the oxygen.

The other day, I noticed one of my fish was dead. When I fished him
out, he looked, shall we say, a little PLUMP!!! Could it be I'm feeding
the fish too much?? I feed them twice a day usually, pretty good
helpings if they seem to be really hungry. They don't seem to be as
hungry as it gets colder.

The lilly pads are dying and decaying now. Should I fish them out of
the pond to keep it clean, or should I let the fish feed off the
decaying pads?

Thanks.