I can tell you an awesome dip for those, but you have to be able to remove all the softies from the tank...
Since I may forget to reply later, I will tell you now, incase you wanna know.
Put all your softies in a bowl, fill w/ tank water, add recommended dose of iodine or iodine based dip, such as the pro coral cure or tech I or whatever that stuff is...
Then, and this is the part that will get rid of those critters, put clear plastic wrap such as suran wrap, on the waters surface, keeping oxygen from getting in. Leave it for about 5 hours.
It will not hurt the corals at all, but the lack of oxygen will make all of those nudi's leave the coral and try to get to fresh water.
I'll try to find a pic...