I have read your thread and feel really bad. I actually was thinking about your position while at the store looking at him/her (Not sure which it is yet?)
I just was looking at the fish and obviously it's hungry (about to go give it food) but it was on top of the sand bed nipping at the mysis that had settled there. So it knows the sand is waiting if it wants to use it.
I am also trying to diagnose it's poop, lol. I'm in the ttm atm. It had a pc of poop hanging that was in between a normal brown and partly see thru. My other wrasse had a darker brown but same shape. Only difference was that the other wrasse eats nls pellets. Kind of don't want to treat just to treat but it seems to shiver it's fins once in a while. Not sure if that's normal or not? Obviously I'll be watching and debating on doing 2x2x2x2x2x2 ttm instead of four 3 day ttm.
I'm also not sure about treating with prizpro as I've read that some wrasse don't do well with it but some were ok.
Got some pics but the flash scared him to much. You can see the poop in the non flash blurred pictures. Don't want to jump to conclusions. I have seen white stringy poop on other fish and knew that it had internal parasites.