Hello all so I’m trying to figure out what could have happened to some of my zoas. I have about 3 different types of zoa colonies in different areas of the tank and one of them just up and disappeared. They were on a frag plug, none on the rock yet, and I’ve never had any issue with them until all of a sudden they just closed up. Next day I checked on them they were just gone. There were only around 10 or less heads but they all just vanished, as if they never existed. Like there’s nothing on the plug at all! Just trying to figure it out because I don’t want to lose my others that seems to be doing fine at the moment!