Stunted Cory? Or Parasites?
I have a pepper cory, who is missing an eye, he has been dubbed the name Eyesik (Issac). I've had him for about 6 months now and he doesn't seem to have grown at all! He's about 1inch at the moment, and at first I wasn't too worried because Cory cats grow slower than other fish but my group of adult peppered corys had laid a ton of eggs back in October and some managed to hatch and survive. Some of these fry are now larger than him! He's much darker than my other peppered corys, skinnier and his tail is angled upwards. He seems to eat like a piggy but he just isn't growing as he should.
He is in a 29 gal planted tank with some adult and juvenile guppies, 4 adult female albino corys and 4 adult peppered corys and a bunch of juvenile peppered corys and 1 clown pleco. The juvenile corys will be going to bigger and better homes soon, as will some of the guppies.
Ammonia - 0ppm
Nitrite - 0ppm
Nitrate - 10ppm
pH - ranges between 7.5-7.8
Is his lack of growth due to stunting, or genetics, or parasites? He acts very typical of a cory, but sometimes I'll find him floating a bit, as if his swim bladder isn't working properly.
First Photo - Eyesik is on the left/bottom by the log, in comparison to one of the juveniles on the right/top.
Second Photo - Eyesik is on the right/top, while the juvenile is on the bottom.
The albino corys are all female (as far as I can tell), and are about 2-2 1/2 inches
Last edited by ajaemily; 02-13-2018 at 01:30 AM.
Reason: Description of attached photos added