Red Gills on Danios

Well, I'm not sure if they make a croaking noise since I don't have the cat like reflexes to net the zippy little bugger! She is a danio after all.

What made me think that it is gas bubble disease is the fact that it doesn't seem to be a fungus. It looks more like a bubble. The more I look and the more I read, however, the more I'm starting to think it is a mouth fungus in its early stages.

I treated the tank with melafix tonight when I got home and will continue to monitor the kids. Hopefully it will all clear up.
 
Usually if I put a cup into the tank and don't chase after the danios they jump right into it. Happens a lot when I'm doing water changes. The good thing about melafix is that it helps a whole bunch of fun diseases including fungus. So you think the amonia burn could have caused the fish to be susceptible to the fungus? That makes sense. Definitely monitor her and the others to make sure they don't develop anything.
 
So this is interesting. I finally managed to net the danio. I took the net out of the water and heard no croak so I put the fish back in. Once I put the net away and look back in the tank I see that the danio no longer has the bluish bubble on her mouth.

Could this have been some type of air bubble trapped on her lip? I've been studying all the fish in the tank for a while and none of them have anything that could be considered a fungus on them. Strange.
 
Or maybe it popped because it scraped against the net? Also, sometimes my danios have weird lumps in them but it turns out they just kept food hidden in them (areas like their throat!) and until they are frightened to let go of the food or swallow it the lump would stay. I would continue to treat your tank just in case. If it did pop, you have to treat to prevent any infections!
 
No prob, just follow the instructions and do it for 7 days. If they don't look better than you can keep medicating, I don't think you can even overdose!
 
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