Tampa Bay Salt Water, KP Aquatics, or even Gulf Live Rocks. Buy mostly base rock @ around $9/lb. plus shipping. Make sure it ships in water. Follow the suppliers instructions for acclimation. Toss a Peppermint Shrimp or some Apitasia eating Nudi's, some Hermit Crabs, and a few Bumble Bee Snails in the sump along with the new live rock.Any sources for the live rock? Like I mentioned with lavey, I'm just nervous about the pests that ocean cured rock will introduce.
The fear of pests should not stop you from adding live rock. They can be dealt with. I get more pests from coral frags than I ever got from live rock. I just got through a bout with Aiptasia that I got from a bunch of Zoanthid frags. My choices to rid the system of them were limited by one particular Shrimp and Nudi loving Wrasse. All it took was patience, some elbow grease, Aiptasia-X, and a Copperband Butterfly. Good excuse to buy a Copperband to boot! I love them.
Oh... and if it's not pests, it'll be something else troubling the tank. While getting the Copperband to eat, I overfed the tank. Now, while the Aiptasia are gone and the Copperband is fat & happy, I have some sort of brown bacterial mat that is trying to grow. I'm working on that now. I think it's a rule... If if aint one thing, it's another. Welcome to reefing.