why am I getting involved in this??? lol here goes
I think they sell pods somehow i think I saw them in a bottle or something, but If you were to get macros from me it will come stocked with all the little buggers you can handle. all my stuff came with the macros and live rock. My fuge looks like the jetsons with all these things flying around.
critters are copapods, starfish, snail like things, bristle worms, and any other crazy creature that comes out of the ocean.
your questions about the rock , yes it is true but I don't wanna get involved with the science you can do some research, I am sure your book will cover it or do a live rock search on line. information is everywhere my young padawon.