The catch 22 is that you will be protecting your collection from the newbies. But not the newbies from the newbies! This stems back to the other thread on incoming species.
You are getting 6 new additions and one ?might? be carrying parasites. This is unknown to the naked eye if they are internal parasites. External parasites are hard to spot on the camouflage of a BP anyway.

I wish you luck in your journey

-Danny