Angie,
I did a lot of reading on parasidic pods when I first started my reef tank. Most pods that are parasidic live with it's host and don't kill it. However, not knowing the type of pods they are/were this cannot be for certain. Manual removal is the only method as they "hook" into their host. Any dip strong enough to kill the pod would more than likely kill the host too. The next question would be that if these little guys are captive raised then how did they come in contact with parasidic pods in the first place. Anything in the dealers system would be suspect and if they had pods the size of erasers they were not new additions. There are thousands of pods out there and by the numbers there are few that are parasidic. For a dealer to have them in their tank and then to be shipping live stock out with them is irresponsible. I hope everything works out for u and the store. Please help the rest of us out and do all that u can to report this dealer to whomever the authorities are in regulating the business.
Angie