Treatment depends on where you live. If in US, you could use Furan as fungus treatment or API general cure.GabrielParker said:pH-6.6
I recently got 9 neons and I couldn't quarantine them so I just put them in.
I'm guessing I need to buy fungus treatment.
What treatment would you recommend?
Oh, 2 of them have it and I bought a fungus treatment that I've just dosed.JenC said:The pic is not good but if it looks like a white bubble on its mouth then it's probably nothing that can be helped. They're VERY common with neons - just Google "tetra white mouth growth" pics and there are tons. The fish will live until the growth impedes its ability to eat, which may never happen. To my knowledge nothing fixes it, it's not communicable, and the fish may live a long, happy life. That said, you might want to keep some clove oil on hand for gentle euthanasia in case it does start to starve to death.