Acro in trouble

[Snappy]

I have a piece of acro that I have had for about 3 months and was growing and colouring up quite nicely, a sort of maroon/bluish/dark purplish. Anyway it started to all of a sudden bleach at the bottom and I had a little section die off and turn white. Bummer but not that big a deal. However, yesterday about half the piece faded to a light green colour and it seems to be spreading. Is it sick? (obviously) How can I save it? Should I frag the remaining healthy parts and start over or wait it out?
All other acros and sps in the tank are fine,(I have about 50 pieces of sps) and it was just this one piece. Was it just it's time or can it come back? Here is a picture of the piece.