Nitrite:0
Nitrate:10
pH:7.6
36 gallon bowfront: 5 platies, 1 swordtail, 4 tetras, 1 dwarf gourami, and 2 peacock eels.
Fed fishflakes and earthworms. 65% water change every week, and 10% sand cleaning
The aquarium has been set for 9 months and was cycled using the fishless cycling method.
Okay, now, I have this female mickey mouse platy who a bent, upward, triangular shaped back. She often sits on the bottom of the tank, or in one corner at the top. She still eats, and swims normally when she does swim. She chases off the males when they try to fornicate with her, but then usually goes back to her corner.
This is how she looks:

(be very jealous of my drawing skills) She is never in a good enough spot for me to get a picture of her.
I have looked up fish tuberculosis, but she doesn't seem to have any of the symptoms beyond the out of shape back.
Thanks all in advance.