I noticed what I think is an aipstasia growing. Can I get a confirmation? I originally thought my Duncan coral somehow reseeded itself .... possible? (Still new to the hobby)
Yes it is. Do not panic. Get joes juice and make sure to apply it correctly the first time. If you do not do it right, it will grow back. Do not try to scrape it off as it will become free floating microscopically and will seed the rest of your tank. If you want to go all natural, I hear peppermint shrimp get the job done, but may end up going after some zoas eventually. You can let them grow a little bit bigger then try to remove them.