Black Phantom Tetra

[§tudz]

Hi all,

I've just been looking my my community tank, and one of the male and one of the female Phantom Tetra seem to have swollen peduncles?
(that where the body joins to the tail fin, for those who arent sure)

3 outta the five seem fine, they are stressed, no clapped fins, water parameters are fine, no heavey breathing.
They dont look stressed or in pain from it, could it be inflamation of the muscles there due to the current in the water?

 

[Sibelius]

How odd, one or two of my lemons seem to have had a similar problem for many months. I've also got 2 phantoms in the same tank. Still, I'm not aware that it's a major problem, mine seem fine and in no distress.