get your nori at an asian supper market. Don't waste you money on live sand unless it's crawling with critters you can move some of the small life from your main set up to your fuge. I might not make many friends by saying this but, live sand IMHO is usually a big old waste of $. Your sand will be live sand soon enough as far as the bacteria goes and you're better off if you pick your own critters.
Max
Max