sorry for such a late reply, i didnt realize messages were sent here! lol yes you can keep sps touching sometimes they are not agressive corals. overcrowding will kill each other simply because they block light from each other and ot because of chemical warfare. to get the rocks loking natural i just keep placing and adjusting until i like what i see. theres no magic to it.
hey i was looking at your pics and i love your acros there so sickkkk but i have a few questions about that...you can really keep them that close to each other like that? and it looks so natural the way u have it how do u like set that up in your rock so natural looking cause idk how i would do that in mine if u wanna take a look i just pic some pics up.