Yep, dry rock will be seeded with bacteria and become "live" over time. Within a few weeks for the bacteria to populate it then a few months til it's all encrusted over like regular live rock. I can't even tell the difference anymore with all my rock. LOL I have maybe 350lbs or more of live rock right now and believe it or not I started with under 50lbs.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.