Pinktail Trigger Color Loss

[seils@cisco.com]

I have a Pinktail Trigger that has been very light in color for last few weeks. Here is a pic:

http://www.maast.org/forums/attachment.php?attachmentid=1163&stc=1&d=1208706687

The tank has been in hypo-salinity for ~1 week due to an Ich infestation. Other water parameters are:

SG: 1.009
Temperature: 84 F
Ammonia: 0 ppm
pH: 8.2
Nitrite: 0 ppm
Nitrate: ~10 ppm

The trigger also appears to be somewhat emaciated, especially around his eyes. He eats well twice a day, and is active.

Any input is appreciated.

Thanks,
Zach