From the seastar expert..."I will say, as an aside, that exposure to air briefly really is not an issue (or none would make it near our tanks). For a healthy, well acclimated star, this is really not what kills them. They are often even exposed in the wild. I don't recommend taking them out and waving them around but a second won't hurt.
I think this idea (along with the idea of not handling them without gloves or a plastic bag) is an attempt to explain their poor survival rate, which is really a matter of acclimation and shipping stress (predominantly). Neither are big concerns for me, personally."
f14peter..."I do the acclimating in a container made up of two identical Tuperware tubs placed one inside the other. The inner tub has several holes drilled in it, and when it comes time to make the move, I lift the inner tub out of the outer tub with the water draining through the holes, then either tip or set the inner tub in the tank."
both questions answered what else is needed? that is the best method right there (i never thought about and its a great idea.)