Problem with pulsing Xenia corals

[Partsman41953]

Hi all,

I have a 28 gallon bow front aquarium in my kitchen that has live rock, sand bed, 2 clown fish, pulsing Xenia and brown mushroom corals. The tank also has a lot of yellow sponges growing on the rocks. The tanks was doing fine a month ago but all of a sudden my pulsing Xenia started dying as my brown mushrooms started growing all over the tank. What do you think might be the problem that my Xenia's have started to die off. I have not changed anything that I was doing, which was basically nothing since I have a protein skimmer on the tank which is keeping the water clean. I test the water regularly and the water seems fine. I also use RO/DI water which I make myself.

Thanks

 

[RobZilla04]

Xenia like slightly "dirtier" water. Chances also that the mushroom corals are winning the battle for the small amount of space and nutrients that are available. You'd have to get some test numbers. Would be best if you had some from before the xenia took a down turn for comparison.

 

[alton]

Robzilla is spot on. I had a 158 g once and if I ran my skimmer, the xenia would not pulse.