I got these beautiful Black Neons in September of 2021. I didn't notice that one of them that was bagged, had/has this gill issue. As learned I quarantined them in the trio for a week, then let them set for awhile longer. They were all active and eating fine so I went ahead and added them to my 40G planted community tank, expecting their boo boo to heal up.. Well it's now almost March, and Lil homie has about doubled in size, but from the looks of it, the boo boo is still boo booing. It eats great and is very active all the time. Never see it gasping or looking distraught. Just asking if they're okay? Or do I need to do something again? Thanks in advance!!
pH: 7.8 to 8
Kh: 80-120 ppm
Gh: 180-300 ppm
Ammonia: 0ppm
Nitrite: 0ppm
Nitrate: 30 ppm