I'm recommending a book for you.
It really more a text book written by a bunch of Dr types including a couple of charters written by dear wife.
My be one of the better books written on Ornamental Fish Health to date
But at $70.00 in paper back it's not cheap. If you get a chance check it out
Fundamentals of Ornamental Fish Health
ISBN: 978-0-8138-1401-8

Rick

I actually almost picked it up. My local BN had it, but it was all shrink wrapped so I couldn't actually check it out.

It's previewed @ Google Books

Buy it she needs the royalties.

Rick