Jus my input in buying wild zoas. All wild zoas will have pest. Dip in fresh water, spray wit fresh water or dip wit coral rx will only kill those nudis. But it wont kill e eggs. By putting 6line wrasse or yellow wrasse will help. They will eat e new hatch nudis. But again not all 6line or yellow will eat pest. N 6line is aggresive which will make u cannot add any other wrasse. My best solution is to frag out those zoas. Check for any pest or eggs. Monitor those frag. Once u r really sure tat there is no pest, u can glue those zoas back to ur rock.
another alternative is to buy frag from reefer. Zoas is an easy coral. Givin them time, it will grow back into a colony.
Jus my 2cent.