Hi everyone... unfortunately i have another issue with my betta... in my 29g. after I took her out for the picture of the tumour on her back, I've seemed to notice another problem. there seems to be something under one of her gills... it seems like a small bulge, but her other gill seems fine. could it possibly be gill flukes? ph is 7.6, ammonia:0 nitrite 0 nitrate 15, 2-3% salinity( idk if that's relevant or not)... I've been busy with cycling my 75 g and treating other fish illnesses, so I'm not really sure when this developed.... I've also noticed this in my previous betta who also lived in the same tank(it's strange because a few days after she got these semi-bulging gills, she died... i thought gill flukes didn't kill fish that easily, could this be something more serious?)... so could there be parasites in my tank? the mollies who live in there seem fine though...