JennM;530296 wrote: Live rock, or base rock?
If it's newly-landed live rock, it can be cured in a vessel of saltwater with water movement and preferably protein skimming, until all the die-off is processed and water tests within acceptable parameters (no ammonia, nitrite and nitrate below 20 ppm).
If it's dead rock, you can use the same method, but it won't become live until it's seeded with some beneficial flora and fauna from live rock.
If it's newly-landed rock and it's pressure washed, I don't think it's safe to add to a DT because the die-off hasn't processed, and pressure washing with fresh water will likely kill off more stuff.
There seems to be a trend lately with people killing off perfectly good live rock by bleaching and such... why not just start with dead base rock in that case?
Jenn