That little girl of yours sure did go through a lot, what a trooper, and what a great fish mom you are!
I enjoyed the thread, not seeing your anguish and sick fry, of course, but the great support you received from the members here...then a weird turn to wine and on to tea and back to your fry lol. I'm so glad she survived.
I also read with interest your thread with Seachem. Especially their last post to you "Well, in any case" hmmmm.
Not to dredge up the whys and how comes...but a theory came to mind. Isn't it possible, being she was in a net, the net 'captured' some flourish and she got a higher concentration of it than fry who might be swimming freely in a tank where it was well distributed? Thus, making you and Seachem correct?
Just a thought.

I'm really glad things worked out for you.