If you didnt have the other reasons for removing the mountain, I would have suggested Tailored Aquatics Aiptasia Destroyer....I used it on my hairy shrooms and boy does it work

....Its gonna look quite different without that mountain....Looking forward to seeing the "after" pics.
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).
http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here
http://www.vimeo.com/2304609 and here
http://www.vimeo.com/16591694