Fresh cut frags are probably the safest bet but even than there is no guaranties. I would advise on a quarantine tank for all in coming corals but not all of us have the space or the cash to invest in another tank that can hold sensitive corals for 4-6 weeks before transferring to the main tank and that's me included. Also try to purchase corals that looks to be in good health, stay away from poor condition corals even if you think you are getting a deal. Moral of the story is BUYER BEWARE!
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