I would QT that fish!! Then do the TTM Meathod. (But I am BIG believer in QT your fish no matter what)
Keep a very close eye on the other fish as eggs can now be in the DT.
Here is everything QT:
The original comprehensive guide to quarantine by @Humblefish How to Quarantine Also by @Humblefish, this pretty much speaks for itself. The Do's and Dont's of Quarantine The dangers of Aerosol Transmission by @Humblefish Aerosol transmission Information on Bio-film and its impact on...
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Here is a write-up you should read quick to help you decide:
Ich eradication vs. Ich management The purpose of this article is to discuss the pros & cons of ich eradication and ich management, and present the best methods for implementing each. Ich eradication - Simply put, this method means doing everything possible to keep ich out of your tank. That...
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Here ar eyour options:
This thread contains links to useful treatment options. Please click on the blue links below for more info. :) Treatment Options 102 provides a brief rundown of most medications & treatments. Acriflavine is a first aid antiseptic. Antibiotics treats bacterial infections. Chloroquine...
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Hope this helps... Good Luck!!