Different variety Zoanthids on same small rock issues

[ViktorVaughn]

I bought this 2 weeks ago and did a dip before placing it in my tank. It was initially placed on a piece of tall rock I have about halfway up my tank (40 breeder), glued down with some fluval epoxy. It seemed to be doing well with most if not all polyps open all day unless a fish or hermit disturbed it. What attracted me to it at the fish store were all of the green and orange polyps (30-40ish). Now, starting about a week ago, the orange and green zoa's hardly open anymore, it is predominately the purple and orange ones that are open. I saw maybe 2-4 of the purple polyps on it at the fish store but now they are all I see. Are they an aggressive or space dominating type of Zoanthid that doesn't mix well with other types? Any ideas would be appreciated I really like the green and orange ones.

Below are three pictures, the first was taken on 9/16, the second 9/21 and the last one was taken today. My Sea urchin decided to undo the concrete like bond of the epoxy and knock it down in the sand. The issues with the zoa started before the involuntary coral rearrangement but it came me a reason to experiment with different tank placements. I left it facing up towards the light down lower thinking it might like lower light, no luck. Same goes for moving it higher and to different flow rates.

sg 1.026
Temp 78
pH 8.1
alk 9
calcium 420
nitrate 5 ppm
ammonia & nitrite 0

 

[accordsirh22]

i have had some zoas do that. get them, they open right away, a week later they close and stay closed. sometimes they die, sometimes they open back up after a few weeks *shrug

 

[ViktorVaughn]

Man that's frustrating, hopefully they will start opening again. Maybe those purple ones are just aggressive and really space hungry.

 

[lhscouchmonster]

when i see mine closing for more than a day, i dip them in coral rx. they usually reopen the next day. ive seen them close and never open again but not since i have dipped them after i have noticed them being closed for more than a day.

the urchin may have annoyed them. a lot of my zoas get very irritated when something walks on them or when i touch them. some stay closed for a day. before i started dipping, i lost a few colonies to what i attribute to being walked all over, then knocked into the sand then picked up several times.