[ACBlinky]

Be careful. There was a thread recently about someone who wiped out their entire tank by adding a bunch of dry rock that had been cleaned very well and stored dry in a bucket for years. He assumed it would be fine, but lost all his fish - I was heartbroken reading the thread. Whether it was oxygen depletion or an ammonia spike that killed the fish, the general consensus was that leftover organics in the dry rock had poisoned the tank.

I'd put your base rock into a bin with SW, test for ammonia, and if you don't see any within a couple days add it to the tank - better safe than sorry.