Duncan losing heads, please help

[dejaknu]

My duncan was doing so, so well since I got it several months ago but then, around a month ago, I bought a small colony of Zoas from a local reefer & ever since, the duncan has been closed up. I gave it some time but now it is losing all the baby heads it had made before. Does anyone know what this might be or how I can treat it? Thank you!!

here's what it looked like before.....

 

[vetteguy53081]

Inspect the area well or even pull the zoa frag and look underneath for presence of eggs, bugs or even little spiders which all would upset it.
These do best under moderate light and water flow.
Temp 77-79
ph 8.1-8.3
salinity 1.025
nitrate < .4
phos < .04
Ammonia < .03
mG 1300
Alk 8-9
CA 440