i feed mine dt's as well (pee-u). i only have very small ones, but i'm looking forward to their maturing! i think it's best to put them in a medium flow area, not right in front of the powerhed, but not in a dead area either as they need flow in order to filter-feed. as far as them attaching to things, i'm not too familiar with that as all the ones that i have were hitchikers on live rock, so they are already attached. from what i understand they are fairly maintenance free, so they should be a simple addition. i have been told, however, that sometimes (i think often when stressed) they can drop their "crown," hide out in the tube for a week or more, regrow their crown, and then reappear out of their tube, so don't freak out if you buy one and when you get home the crown is detatched and in the bottom of the bag.