I've had these red zoanthids for a couple of months now and was doing very well ever since a few weeks ago. Some of them started to get these white dots all over their stems, not all them have the white dots only a section has them. About 25% of the entire colony has the dots on them. And the ones with the dots don't seem to open up at all. The rest of them open up just fine and look very healthy. Are my zoanthids infected with something? Like I said at first they were all doing fine, no issues at all. All opened up real nice and looked all very healthy. Any ideas? It is definitly getting worse and it is spreading to the rest of the colony rapidly. It also seems that my purple zoanthids are starting to get infected with this and they are on the other side of the tank.