Mine are in a 125 reef. Not an ideal breeding set-up, but I wasn't planning to raise them. I've managed to collect two broods in spite of that.
I've seen the set-up at Inland Aquatics and they have them in tanks with clay pots for hiding, some macroalgae, sand/coarse rubble, and that's about all. Some are sharing tanks with clown pairs. I don't know what size the tanks are--they're all plumbed together but I'd estimate that each tank is 15 or so gal (I may be way off on that).