Cardinal Tetra with growth?

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MunchieBunchie

Aquarium Advice Newbie
Joined
Feb 8, 2014
Messages
4
2 weeks ago I introduced 5 Sterbai Corys into my tank, everything seemed fine until Saturday when one of them became ill with what I think was Swim Bladder Infection and subsequently died the next day.
The other Corys seem to be fine however last night I saw that one of my Cardinal Tetras has developed a swollen gill, or had some sort of growth on his gill.
I've attached a photo (apologies for the quality - they're very hard to photograph!), he is gasping rapidly yet still has a appetite.

The tank has 6 Cardinal Tetras, 5 Sterbai Corys (1 died on Saturday) and a Dwarf Gourami.

Water parameters are;
pH: 7.2
Ammonia: 0
Nitrites: 0
Nitrates: 20ppm



ImageUploadedByAquarium Advice1398781356.681959.jpg
 
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