My Biggest Koi (18'') have started having ulcer since two month ago
and it is getting worse, I only captured him once and applied the
medicine, (trust me,it is very hard to capture a fish in 6000 gallon
pond) what should I do? (I do not have a quarantine tank yet) will he
died from it or it will eventually recover? what else can I do?
My other fishes seems to be doing fine. (ammonia,nitrate (nitrite?)
all 0 )
Please advice.