The fry were fine until about a month after birth.
Several of them began showing a little "fluffy" almost cottony looking thing sticking out of them.  Those ones got very emaciated.  Some of them almost looked like little furry udders and were half as large as the fry.  
Those ones all died.

A few weeks later the remaining fry got incredibly swollen and hard looking, and I could actually see something white and ropey pressing against their insides.  I immediately thought 'worms' and tried several different remedies (Parasite Clear to treat the tank, fish food treated with metrodinazole, and lavamisole, etc.) but they also all died.
Also, EVERY single pet store in my area that carries fish products (9 stores total!) had expired Discomed, which I read here is the de-wormer of choice!  I'm not sure how effective expired meds would be... I believe the dates were Feb 2004... but wasn't willing to spend the $15 or so.  

NONE of my fish (30 of whom are now deceased) ever showed anything that looked like camallanus red worms.  Just the large fluffy blobs, small bubbles, and then the swelling/ropey insides.  

I was never able to figure out what happened, or what to do about it, and I'm still too freaked out to spend money on new fish.