The ones at the bottom of the tank that close, some cream looking zoas that kinda close, uh they aren't fully closed but not open either, my xenia was closed earlier and now its pulsing again and some green buttons that are closed,
I bought a frag about 3 weeks ago of green button polyps (separate from above) and they never started to prosper they just bleached, the two biggest heads are white! I dunno what to do with them I had them close to the top, and then I moved them to the sand, its still alive cuz when agitated they close but most of the small ones are always closed and its a good size piece prolly 30+ heads, I can't figure it out cuz everything else in my tank is fine
I know someone will ask...I have 4 24" T5 pretty sure it 24W each