Difficult to get a photo because the fish has gone into hiding-my first sign of trouble.
Parameters are seemingly fine, ph read approx 7.8, ammonia is <0.25ppm
The area around the eyeball and the eye itself has bulged slightly. Not a moor goldfish bulge, but still quite noticeable.
Other tankmates include 7 Serpae tetras, 2 golden wonder killies, 1 Otto, and 1 upside down catfish. Tank size is 29G.
My other GBR passed away not too long ago, my reasoning was because this one was bullying it quite a lot. I was hoping to find a female and re-home the male. Alas, I was too late to save him. Hoping I can save this one though.