I got the primo deco live rock from Gulf Live Rock about 10 years ago when I started my first reef tank. It was a very memorable adventure, starting with renting a zip car to pick up the 80 lbs of live rock in a leaking box from the Logan airport deliveries section. Thousands of creatures in were in the box , including several mantis shrimp (the largest ate the others and became my favorite reef creature ever until he killed some of my fish), some crazy crazy worms, a weird crab, limpets, snails, an urchin, nudibranchs, anemones, sponges clams, lots of corals even (not the restricted kind). It was incredibly interesting and awesome. For many months, every time I looked in the aquarium I would see something I had never seen before. There were also a dozen or more macro algae species, some of which became a pain later on. 10 years later, many of the clams and sponges are still on the rock (the sponges seeded my cryptic zone), but that is about it. The rest died, was eaten, or was removed by me. Anyways, I highly recommend it - although maybe not if you are also planning to glue a bunch of high end acros on the rocks...they probably won't be able to compete for space with all the algae.