weezer: as I said on another thread, you can do that, but what's the rush? Ask any of the successful aquariasts on this forum what is the most important thing they have that has led them to their success, and they will all tell you that it is patience. Trying to rush a tank just gets you into trouble faster. That said, I did add fish with well cured live rock, but I was very careful about how the rock was transported - I brought my own buckets with tank water to keep the rock submerged on the trip home so there wouldn't be any die off.