Need help my xina pulsar coral is bleaching

[daniella3d]

What are your parameter? salinity? KH? PH? ammonia? nitrites? nitrates?

I have the white pulsing xenia in both my aquariums and they are doing great right under a 250 watt metal halide or under T5HO, does not matter. they do well under any type of flow but they prefer not too strong but not too slow either.

They need trace of iodine in the water and when ever one of my xenia look bad, I take it out and dip it in Lugol for about 20 minutes at "dip" concentration that is specified on the bottle. This always seem to revive them after a few days.

[isaac1]

Ya I'm not sure I do a five gallon water change weekly and I run two korial 425 but since I've added the coral I've had bad diatom outbreaks