sick zoas

Zoa burned skirt, how to solve this problem? Hello reef comunity I have a problem with a certain frag of zoas. They do open up during the day but they have really small or not existing skirt. During the night they have something that looks like cyano. I thought it was a burn from an amonia...

Hi about 3 days ago these zoas stopped opening up all the way and looked odd maybe deformed. The tank is fairly new maybe a little over 4 months now, so these zoas we're still growing on the plug. I noticed that there was a couple white sponges growing on the back and the side of the plug as...