thanks paul. i really like marco rock but the story behind mine is a little more bitter than sweet.
my cousin is also a reefer and he had a gorgeous 240gal tank set up in his basement. the system had been up and running for about a year, it had just hit that magical age where everything was syncing, the biology had settled in, and his growth had started to take off. he came home one day to find his tank entirely drained onto his newly finished basement floor. the front seam of his 1 year old tank had let go rather catastrophically.
he lost all his coral but a couple of his fish and one of his clams survived. it was about 10 years of accumulated organisms. i rescued his favorite tang, a sailfin and the clam from the fish store that was holding what had lived. they'll hang with me until he's ready to give it another go. it's hard to even get him to talk about reefing atm but he'll come around someday i'm sure.
anyway, the good part is he gave me all his marco rock

. it's very attractive rock imo though i would check out bulk reef supply's rock as well were i to buy more.
you didn't miss it. i haven't mentioned my skimmer yet. i don't plan to use one on this tank until i decide i need one.
that's going to be difficult for me because i freaking LOVE skimmers. i love the engineering behind them, the smell and feel of them when you pull them out of the box, etc.. i've read every article i've been able to find in the last 10yrs about skimmer design, theory, tuning.. i've modified several skimmers i've owned, etc.. i'd visit other reefer's homes and be like, 'yeah, yeah. great tank. let me see your skimmer..' i used to joke that i setup reef tanks so i could run skimmers.
but the most successful tanks i've run didn't/don't have skimmers. a lot of what i enjoy about reefkeeping is that there are many ways to run a successful tank but the key is finding which way is most successful, for you. for me, that appears to be a dsb, macro algae export, and all the biodiversity i can maintain. so that's my plan for this tank.
this is not a dogmatic thing for me. i'm not leading/following/participating in some anti-skimmer movement. if there's an emergent situation that i think calls for some skimming, i'll throw every one of the old skimmers i have lying around on this system in a heartbeat. even my old pos lifereef that i modified to use airstones

. and if i decide skimming's going to be necessary on a continuous basis, i'll be ordering up a nice big etss. never got a chance to run a big downdraft skimmer and i've always wanted to..
sorry, those were two innocent questions and i went off a bit..