We're going to attempt the needle decompression this evening as explained in the video ReefBuilders posted awhile back:
http://reefbuilders.com/2011/12/01/...s-simple-procedure-correct-downswimming-fish/
I haven't come across another, more applicable, video. I'm going to try and set something up to backlight the fish. I'll try to video the process for anyone interested.
And, for who ever reads this, to make something clear: we're using metroplex in the food, not in the water column. The wrasse hasn't eaten anything so it technically hasn't received any metro yet.