Originally Posted by Nu-Nu the eel
I do not agree with that. I have about 15 different types of zoas and they do no sting eachother to the point that there is damage. I have 1 frag that has 3 different types of zoas on it alone an it is not a problem at all, they are thriving and growing. All i see there are palys, zoas, an mushrooms. I have all 3 of these species and they are all touching eachother, no problems at all. This is my experience.
+1 zoas and mushrooms have no aggression altho i think the yellw polyps do have slight aggression since you bought the rock like that shows they can live together imo
whats going on may be natural acclimation the zoas are adjusting to your water they may open for a day or two then close a lil during this process totally normal also hermits crawling along zoas can irritate them causing them to close if you have hermits that could also be a possibility but for 60$ i think you got a great deal and the rock looks nice