Blue Streaked /velvet damsel

[marie]

Originally Posted by krschulz

Thanks. Not sure the difference between SPS and LPS. He seems to pick at them but not sure if it's just algae on the hard stalks or if he is after the polyps. He picked at a Xenia which shrivelled and died within 2 days.

SPS=small polyped stonys, LPS=large polyp stonys. Both have a hard, calcium based skeleton.
Softies have no hard skeleton anywhere (like xenia) although they do have calcium spicules in the coral tissue to supply some rigidity

You could always try removing the fish and see if it helps but I suspect you might have some water quality problems your not (or can't) testing for.