(I'm assuming that I'll need to sterilize the tank.)
Ingrid wrote (at some point in the past...):
It is not a good idea to put the fish back into the tank they came from
until that tank is cleaned out or treated first for parasites.
Betadine (10%) I presume?
How many rinses before it is safe to put the fish back in?
"Faced with the choice between changing one's mind and proving
that there is no need to do so, almost everyone gets busy on the
proof." -Galbraith's Law