so I should wait until tomorrow morning then? What about adding in the raw shrimp now should I do that or wait?
Agreed. Since your tank is 55gal you want to shoot for about 1-1/2lbs to 2lbs of LR per gallon water. This depends on what type of live rock you are using and how porous it is also. Obviously you can substitute some of the LR for some base rock like you have but you will want to get more than just one piece.How much LR are you gonna put in? When you say a piece do you mean just that? If so thats not gonna be nearly enough to support a 55 gallon tank. You will need atleast 20lbs of it but more is suggested. Drs Foster and Smith has great LR for pretty good prices. I got 16lbs for $95 shipped.