Zebra Danio Swimming Nose Up

[Mand135]

I have a Zebra Danio fish who cannot seem to swim properly, some of the scales on her back are paler than normal and she is swimming with her nose higher than it should be. She also seems to be in distress. I had the same last week with a male, he swam progressively tilted nose up until after a week he was virtually vertical. I sought advice but didn`t get any answers, then he died in the hospital tank about a week after i noticed the symptoms. Now that one of my others is doing it i want to try and save her. I also have Neons in the tank and they are doing fine with no trouble at all.
Any ideas?
Thanks.

Edited to say that the fish are not swollen at all and the scales are flat, only as mentioned slightly paler along the back. No external parasites visible.

 

[kribensis12]

I would say that somthing is wrong with her swimbladder. Boil some frozen peas, then shell them( they can digest the shell), mush them up and feed it to the danio. What are you water parameters? Can you post a pic?

 

[WILDER]

Need more info i'm afraid.
Size of tank in gallons or litres.
How many fish and which type.
Water stats in ammonia,nitrite,nitrate, and ph.
What do you feed the fish.