hehhe yeah i actaully really like the look of that xenia forest, I have let my own thicken right up and my tangs are hiding inbetween the stalks :)
I havnt noticed any ill effects running xenia and SPS side by side, when I went full SPS in my display I still ran it in the fuge and it out competed the marco in there.
I have heard people say its needs dirty water to survive but its the only soft coral ive had that thrives in ULNS (were even LPS has starved) as long as the lighting is strong. If you are particaully concerned about the slime carbon seems to do the trick after I chop mine up.