Cool! Looks like it's been a very productive day! You had mentioned in your earlier post that the LFS gave you a discount since the pods were almost out of date. I had meant to tell you to be sure and smell the water in the bottles before dumping them in the tank. Rotten egg smell means the bottle is bad and will pollute your tank. A sweet, salty smell is what you want. Sounds like at least some of them are okay. They are tiny little critters, and most of them you won't see. I don't think they get any bigger than 1mm, so it's very hard to see the younger pods... even when you shine a light through the clear water they come in. Anyway, you're off to a good start!
PS: It won't really matter if the rock is live or dry. I would prefer live, but it isn't necessary. They'll flock to either one. As long as there's food available, they're basically looking for a good surface to attach to.