Thank Rich and Kris, and Don. I would definitely needs some of your help when I am setting up my future 180, hehehe...
I am just not feeling so good after I lost a few piece of sps after the transfer and the move. On top of that, after I transfer all my corals over to my new tank, i noticed this layer of stain on the fron glass that I now need to take it down again!!!
I am going to try first with a vinegar bath for a few hours and then see if I can scrape it off with razor. If not I have to go out and get some bleach, and a can of Muriatic Acid.
And I'm loving the current aquascape, just have to replicate it after the bath.