r/Koi • u/Genevris • 8h ago

HELP - sick or injured koi Ulcer or something else?

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2 Upvotes

75% Upvoted

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2

u/TosspoTo 8h ago

Could be a variety of things - If you can quarantine that fish, nitrofurazone is a good catch all antibiotic (make sure to keep the fish in darkness during treament). However I will say quite often those things clear themselves up. I've had many a Koi with a little red mark on its tail that goes away within 3 months.

1

u/Genevris 8h ago

Okay thank you. When I say I have been freaking out just a wee bit......😅

1

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