Thursday night I had had it with an obscene number of bristleworms. I had dipped the corals when I set up the tank, so they must have been hiding in the sand, or I didn't use enough coral X, so the second round, I tossed in much more of the Coral X. I did kill lots (probably ten huge ones, and many little ones). The next evening however, all the pulsating xenia were turning brown and clearly dying. The water was too cloudy and I realized the water quality was going down the tube in my 28g nano tank. I have done a 7 gallon emergency water change, but will need to do more, close to the same amount. Giving it an hour or so especially given the water is cold. I siphoned about 2.5 gallons of dead xenia off of the sand and scrapped off the dead xenia from the coral rock as best as I could in bucket. Too bad as it was a pretty dark purple. I can't think of much else to do, but do remember I'm real new to salt water tanks. I still haven't heard from Elite Reef on what the other SPS corals are in the tank, but don't want to lose everything. If you can provide assistance that would be helped by a phone call, please PM me, and I will provide my phone number,Emily, the mom.