08-07-2006, 01:26 PM
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You can go with base rock which is alot cheaper then live rock. I reason that the corals were stocked like that is because each coral has lighting needs. Some need more then others. If your only going to set up a 30 gal reef system. I would get a little bit of live rock and then just fill it in with base rock. In my setup(there's a pic posted in saltwater pics. Most of that was base rock or dead pieces of coral at one time. What happens is if you keep your lighting good and calcuim at the right level(400-450ppm) the coralline algea that lives on the live rock will transfer to the base rock.