Yoyo loach Fungus?
My yoyo loach has a large white spot (fungus?) on her snout. See picture. She's eating and active. No tank mates have symptoms. I haven't added anything new.
This is a 20 yo, 55g established tank.
The pH is 7.4, Ammonia, Nitrate & Nitrite are all 0.
Does anyone know what this is and what to do about it?
Thanks in advance.