Zooanthid problem

[Zoaelite]

I completely Agree, Zoas close up time to time. The one parameter that I would check though is your ALK. Usually sensitive zoas closing and loosing mass are the first sign of an ALK spike. The inevitable truth is that from time to time colonies melt away, even the best of us cant stop that. Good luck with the zoas though looks like you have some nice pieces.
Levi

Originally Posted by reeferious

i like zoanthids in fact i absolutely adore them they're so colourful and undemanding that i must have atleast 6 large colonies growing in my tank. i'm always seeing swath of them closing for few days and reopening afterward. different types will grow and spread on same rock until they grow into eachother then each colony drew a line somewhere stop growing toward each other and begin spreading outward. like i said i like them so much i just dont have the heart to trim them back to size. so i wouldn't worry if you see yours closeup once in a while.