if your cycle is done and your water tests are in range i would add the snails first and then the fish. wait a while though on the yellow tang. if you add him first he will pick on every fish you put in the tank so let the other fish establish thier territory before adding the tang. good luck. the tank looks great by the way good job.

[dave]
__________________
120 gal/in wall tank/starboard substraight/2 250 watt 10k xm metal halides/ 4 55watt 03 actinics/150lbs lr/scwd on return/scwd on a closed loop/aquaclear aquatics 200 pro wetdry w/skimmer.
ask all the questions you have if we cant answer it we'll make up some thing. remember patience is the key to a kick ass reef.
dave.