You are currently using Prime, correct? If so... stick with it... it also helps their slime coat... changing things may increase her stress.

So do you mean the bloody-splotches are clearing up? That could be a good sign, or the blood could be shunting away from the surface to the vital organs (making her look pale).

Since she's declining, you could try adding the QC again... or the Maracide which is considered milder and more tolerated. It's hard to say whether she'll respond favourably or not. If you can find Kanaplex (kanamycin), that may work better as it is considered a stronger antibiotic with less resistance issues. It is a bit harder to find, however... I'd call around for it so you don't waste your gas looking. You also may have better luck at individual stores rather than the chain shops. (I had to get mine online.)

It's really hard to say if she'll make a turnaround or not. I hope she does...

Michele