u/EbbSecure8214

Hi guys I’m fairly new to the saltwater side of the hobby, tank is about 7-8 months old noticed today that this group of zoas looks like some die off or possibly spider damage? I’m not sure what the spider damage looks like(haven’t actively seen a spider even at night) but I’m at a loss. All other corals in the tank are open and healthy including the other zoas, in fact the colony that looks a little rough is still actively spreading. No white film or brown jelly that I’ve seen so I’m at a loss. I do small water changes every week to keep parameters good.LFS said that sometimes if a colony gets to crowded they can have a small die off to make space. Any help would be appreciated, thanks!