I'd never heard of clownfish feeding a nem, until I saw a clarkii grab a bit of fish and stuff it into a nem in my LFS.  Amazing stuff 

some try to feed the LR they've hosted too!

I'm going away for 16 days over xmas, and wondering what to do for the best with these Clarkiis.  I figure I need to get them in the DT, so there is only one tank to run whilst I'm away.  I plan to move the LR and fish over to the DT, and drain down the QT.  When I'm back, I can throw in the not so pretty LR that I planned to swap over and some fresh water and it'll be good to go instantly.

The question is, how much longer should I leave the Clarkiis in the QT?  They've been in 12 days now, and there is another 23 before I leave.  I figure I need to leave say 7 days to sort out any issues if anything crops up, so here's the options:

• Split the rest of the time evenly.  23-7=16, 16+12=28, so 14 days in QT (just two more to go), 14 days in DT, then 7 days spare to sort out any issues
• Stay in QT as long as possible.  Lets say another 9 days in QT, taking it to 21, then 7 days in DT, and 7 spare.
• Move to DT now, to give as long as possible there before I go away
• Any other suggestions?

What would you do?

I'd get them down to hypo-salinity for the remaining time you can just to make sure, then raise it back up slowly before adding them.

You can drop salinity pretty much instantly without much distress, it's raising it from a lowered state quickly that causes harm, due to the direction of osmosis in marine fish.

Good idea.  However, I have LR in the tank with a big feather duster worm.  I can't do Hypo-salinity without killing all the life in/on the LR, and if I shift it to the DT, I may as well move the clowns

Ah.
This is you.