Questions - Need some input

First I'd like to say thanks to Melev for all of his articles over the years, I've learned a lot reading them and have enjoyed following along your blogs.

I am setting up a 180 gallon tank that will be mostly SPS. I tore this tank down in 2008 and am setting it up again with some updates. Main one being I'm switching from MH/VHO's to AI LED's.

I've been doing a lot of reading and research and I am planning on running Biopellets on this system. Is a refuguim required ...