Hmmmmm . Now that you mention it spring has passed and summer is here and I haven't heard the term SVC come up either... ALTHOUGH.
Someone on another board ? Mentioned a case of a pond with no new additions in over a year where 15 older koi had died in a very short period of time(one day) but the goldfish all survived... all but one GF, as I recall.
He said they cut them open and " the organs were mush"???
I think I'll go pound on some wood ! :shock: