I have got this coral from my fellow hobbyist. He checked my parameters and said everything is fine to add corals. Few are doing good but other don't . Please help. Thanks in advance
3 days .How long have you had them? I've found that some zoas take longer acclimating to a new environment than others.
I'd say they're still getting acclimated, some of mine I just got are still very sensitive and will close up and stay closed for the day if I mess with them even after having them for 2+ weeks.