This sounds like a terrific mix. I think I'd like to go with it. Xenos and paracyps are something I haven't done before.
The cookie cutter says a couple calvus in there wouldn't be amiss. I assume that since these are sand sifters, it'd be preferred not to sub in shellies for the calvus? I'd prefer shellies, but calvus will work, too. Or should I just stick with the xenos and the paracyps, and leave out a third species entirely?
Also, a question on aquascaping. They'd like a flat rock or two on the bottom, correct? Would flat landscaping rocks work, or should I very carefully stack some rounded ones?
Oh. And will the paracyps work as ditherfish, or should I toss in a little school of rainbows or something to dither?
Thanks a bunch, guys! This is really exciting!