Molly With Droopy Tail

[mav82uk]

I have a molly with a droopy tail.

Only noticed it recently i and it looks like her body is in a boomerang shape or a hump back. She is struggling to swim very well although is eating normally with rest of fish.

i have a 90 l tank with the follwing fish:

1 albino shark
5 phantoms
6 red / bloody nose tetras
2 guppys
2 sword tail
5 cherry barbs
1 baby bristle nose pleco ( i think, not seen him in a while)

i have ran out of testing equipment but have recently completed a gravel clean / 20% water change. and last time i checked water was ok if with a tiny bit of nitrate. i mean very small amount.

any advice greatly appreciated.

 

[WILDER]

Get your water tested at the lfs and ask them to write the readings down for you.
The shark needs a larger tank.

Can you try and load a pic up of the sick fish.

Does she look thin or bloated.
What does it look like when she goes to the toilet.
Is the anus enlarged or red and inflamed.
Is her belly sunken in.
How old is she.

Bent spine can be old age, fish tb, vitamin deficiency, internal parasites, injury, birth defect.