HI, I'm new and need to ask a question about a female M. boesemani
rainbowfish with a white pimple like growth on her chin
(snip)
Howdy Diane! On the face of it, looking at the logivity of this
affliction, my best guess is Rainbowfish Ulcer Disease. Others may
disagree.
What to do about it? Opinions vary. If you look at the archive of a
couple of months back you'll see we had quite a vigorous discussion on
RUD.
Regards, Andrew Boyd