I had those in my 180. They are supposed to be host specific, but they have jumped to astrea snails. They only ride there, they don't seem to be killing the snails. So I don't think it's safe just yet to add another clam even after 9 months or so of being clam free.
2nd, I got this clam for free. I did notice the tank it came out of had some FW's on a Monti cap. So I definitely don't want to put it in the 180 SPS tank. It's in a softie 70 gal.
Can you dip clams or treat them with FW exit, lugols, or anything else???