29-Gallon 3 months old
1 juvenile angel, 1 male swordtail, 1 female betta, 3 cories, 3 neon tetras, 4 black skirt tetras, 2 red-eyed tetras
Ammonia - 0ppm, Nitrite - 0ppm, Nitrate - 10ppm
Water changes - 25% weekly
My peppered cory cat is sick. Two days ago I noticed he seemed to be lying a little lopsided at the bottom of the tank, and today he was completely limp. When I netted him to separate him from the other tank mates, he just rolled onto his back into the net. This little guy is normally very active and energetic.
As far as I know, he is about two years old. Could this just be old age? He was not a starter fish and so has not gone through the distressing cycling process, and nothing unusual has befallen the tank. He shows no outward signs of illness and as far as I know he has not been bullied.
I will post a picture in case that helps at all, but he doesn't have any split fins or blemishes that I can detect.