I know nothing!
Well, I've got a very unhappy xenia, I've had it 6 months or so, and it has been doing quite well, having split twice, and growing well. around the middle of Dec. I took a piece that had detached from the main plant and moved it to my frag tank 'fuge. There it has happily started to grow. Dec 26th I bought Mushrooms, Zoas, and a yellow toadstool leather. Everything has been going well with everything, with a exception of some HA on a GSP, even the older corals in the tank have been very happy looking. Then about a little over a week ago, I moved some true peppermint shrimp to my main tank, and increased my skimming. These are the only major changes to happen about the time the Xenias stopped opening, and started to look pathetic. It has affected all the Xenia colonies in the main tank, but the frag in the frag 'fuge has been just as happy as always. My current theory is that it isn't a water quality issue, as the the frag is happy, but that something in the main tank is causing the problem. I'd remove the Xenia to a different tank, but the rock it is on is at the base of my entire tank, and removal would take hours and disturb the entire tank. My main thought is that it is the peppermint shrimp causing the problems, and am attemping to capture and remove them to one of the other tanks by trapping. If not could it be that my Cabbage coral has put out a "sweeper" in responce to the Zoas, and is getting the Xenia because it is closest? or could the yellow toadstool be doing it? any other culprits I should be looking for?