I have a long tenical Xenia that died not sure of the exact kind. but it is dark pink with almost like a blue line on the under sided of it all the way down to the base. The biggest piece of it died in like 24 hours. It shrunk then got like a red/brown algee like stuff on the base. within like 10 hours the algee stuff took it over and it was going in the morning. Now a smaller piece is getting the same thing. Any idea what could be causing this?

I have pulsing xenia that is taking over the other side of the tank just fine. My zoas, mushrooms, kenia trees are doing great. I do have a leather finger that is right above the coral that is dieing that when the water blows just right the long tenical Xenia will touch it. I am not sure if that is what might have caused it to die or not. I noticed right after the first one died the finger went into what seems like its shedding stage, it does that about once a month and it is about time for it to do it again. But I did find it weird that it did it right when the other coral died. I have never had issues with coral dieing before only marron clowns. I had 5 that I bought at the same time and 4 of them ended up with some time of internal parasite that I guess is common for clowns.

The water quality is great as far as nitrates, ammonia, nitrites, ph and salinity go. it is a 37 column tank with 4 55 PC lights on it. tank has about 80 lbs of live rock, 2 skimmers made for 100 gallon tank, and a 4-6 in sand bed. Live stock is 1 marron clown, 1 ebiles Angelfish, 2 cleaner shrimp, 2 peppermint shrimp, 1 brittle star, and 1 anemone crab. The tank has been up for about 8 months now. But half of the live rock came from a friends tank that was up for almost 6 years, the other half came from the fish store.

Any help would be great