Anything you should know? Well, you are getting some awesome rock! I got some of their coral rock a couple of weeks ago and it had all kinds of bonus critters in it. 3 starfish, several crabs, some kind of goby, anenomes, feather dusters, worms, and a mantis shrimp. He's found a new home today. There will be little die off if you have already cycled your tank. But still do some water changes a couple of times a week at first and make sure you have a skimmer going. Also, keep in mind that the water temperature of Tampa Bay is in the high 60's right now so if your tank is 78-80 this might be a bit of a shock. I keep mine at 74 and I don't think I had any die off except for a sponge.