Total stockin plan

Ok. I've got the water stabilized. pH at 8.4 (using R.O. to bring it down), s.g. at 1.0024, C at 450ppm, alkilinity at 320 milli/equiv. per liter. Two more weeks of cycling or so. I have 8.5 pounds of base rock in there for further seeding. I was planning to add 30 lbs of Gulf View in there, let that sit for 2 weeks, then start stocking. Will all of these be compatible?
1- Ocellaris (added last)
1- Fire or Purple goby (first)
1- Bangaii Cardinal (2nd)
3-4 Blood Fire Shrimp
3-4 Skunk Cleaner Shrimp
1 Brittle Star (after a few months)
1-2 Feather Dusters
10-12 Red Legged Hermits
Turbo snails as needed.
I plan on doing a 10% weekly water change, and I have all intentions of buying a refugium (19" by 4.5" by 12") and throwing in some live sand (how much?). Sound good? I'm just about ready. I wanted to say thank you to everyone who's helped me out and been oh so patient with questions I'm sure they're asked a few times a day, particularely Oriongirl. Thank you.

I meant to put 8.6. I want to get it down to 8.4 before the stocking begins. Thanks again, I'll take a look at that site.

That just made my life easier. Thank you very much. I used tap water to fill it up, and now I have a 20L with R.O./salt ready to go. Perhaps that'll make a difference. Either way you helped. Thanks. By the way, I tried that website and the comp couldn't find it. I even searched for it on yahoo. Any other place that has that calculation?

Thank you very much for that. That's about 28 pounds (30) of sand. So what do you think...20 pounds of southdown or equal and 10 pounds of live sand as the top layer?

Could I just grab a small piece of lr rubble from my lfs and stick that in there until things start to come out? And also, you mentioned bristleworms before. If I can't find any...what else would work? Thank you.