i am just starting to set up my 30g saltwater tank. I am planning on to run 2 aquaclear 500 and a 800gph under gravel jet system. I already bought live sand and crushed coral. I am planning on to add live rocks into my tank. I wanted to know when do i introduce the rocks? how much are they per lb? how many lbs do i need? Do i have the right equpiment for my tank? Do i need a protein skimmer? Sorry for all the questions but im a reall newbie when it comes to saltwater thanks for reading please REPLY!!!!