Question on bleaching corals.

Unfortunately it sounds like they sloughed tissue.. also known as RTN for Rapid Tissue Necrosis. I'm guessing the water in the bag was cloudy and possibly foul smelling when opened? If there is any tissue whether brown or colored you can either leave be and hope it stops (usually it doesn't on a frag) or cut above the white into good tissue to seperate it from the decaying part. With an average frag size it's easier said than done and still could very easily spread to the remaining piece. IMO unless you have a stable and healthy tank, corals that begin this process are better removed from the system and either quarantined, fragged, or disposed of. Leaving them in the tank can pollute/stress other coral that may otherwise be fine.

 

Not knowing your system and if you have a seperate system. I would say you could cut the remaining portion that is good and either secure it somewhere safe for a few days or glue it to a plug with as minimal handling/stress as you can. If it continues up i'd say it's a goner.

The only thing I will say is most vendors will offer an arrive alive guarantee on orders shipped, I don't know how they handle shows. IMO corals at shows can be quite stressed depending on the travel time and other factors in setting up. I guess you'll find out what they are willing to do.

Good luck

 

Another thing also is that change is light will also stress the coral. So make sure to put them al the bottom ajust for your style or light. In my tank usually when I get new coral I dim both blue and white leds to half way.