Byrns149
New member
My 30 long has been set up for 6 months now and since then everything is doing great. Ive had this one zoa colony flourishing in the same exact spot for months and then a couple days ago it stops opening. All the polyps are closed except for 1 or 2 and its driving me insane. This was my prized colony!!!!!! What could it be? Literally nothing has changed.