I have a 10 gal
tank with 3 black skirt tetras 1 white skirt and an oto. the white skirt is the oldest member and her mouth seems to have moved from the point of her face up her face toward the top of her head. The bottom Jaw flesh seems to have gotten bigger and the top lip receded so that it looks like she cannot really close her mouth totally. I suspected maybe mouth rot, but there is no white fuzz on her.
I had one other white skirt go this way until he started swimming on his side in vertical circles and doing stupid stuff so I euthanized him. Any ideas what I am dealing with? Could it just be an old age issue?
Her right eye seems to have eye pop also, but her left one is okay.
I have been changing the water weekly, but the water temp is a little high due to treatment for suspected ich. Any suggestions would be appreciated.