Bro are those the final rocks you gonna use for your scaping. If so, I am afraid to tell you that the effect may not turn out as good. I found out that hard way, constantly buying different rocks to try out. From my experience, to get the best effect, you do not need many rocks, instead, get the biggest rocks you can find that you can find and stack them together. The big rocks each have their own unique shapes, looks good when place alone and when stack together they give very natural look. Little rocks stack together do not create much caves and look like un- natural abit like LEGO piling together.
Right now, RB has very nice and huge live rocks for sale. They are curing the rocks right now, and you may want to look into that.
Hope that helps
DA