Another Goldfish "sudden death" :(

I fed them this morning and all were fine. Nothing looked amiss. I went
back an hour or so later and found an Oranda dead in the plants! No
sickness, no loss of appetite, no fin rot and a scrape showed no parasites.
It died quickly and with no symptoms. I had this fish over a month.
--
Koi-Lo....
Frugal ponding since 1995.
Aquariums since 1952.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
*Note: There are several *Koi-Lo's*
on the pond and aquaria groups.
~~~ }((((o ~~~ }{{{{o ~~~ }(((((o