dk wrote:
(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?

-D
--
"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