as far as the scaping goes, i leave my base rocks in and they are buried, I do move around the top 6 or 7 HUGE rocks i have when I add another territorial fish ( like when i get my sohal in a few months). Though i do have 4 triggers, 2 maroon clowns and a few others, all are territorial. And no it doesnt upset anything, I use a turkey baster to clean my rocks every few days so detritus and all that other fun stuff doesnt cause a phos/nit nightmare with all the heavy eaters i have in my tank. (I also stir the sand right before i do a water change) and if you are going with smaller fish you could easily add one or 2 more.