Interesting question, but anemones pretty much totally deflate in tansit so what your asking is if the water in the bag with them is safe, and my answer to that would be no. The anemone should have no problem with being exposed to air in the breif seconds it takes to transfer it to a bucket with some of your tank water in it after you temp acclimate it.
Personally I come from the line of thinking that ICH is always present in a properly maintained tank, but will not break through the fishes natural defenses if the fish is healthy and not stressed.