the common concensus w/ people on here that have been keeping them for a while say temp around 87 and live. now, there's nothing wrong with feeding them dead foods, but they should still get some live. my little guys eat plenty of small frozen foods, but they still get feeders about once a week.
just read up on the threads in here and you'll get a lot of information about keeping little ones. IME (and as I've been told), they need lots of oxygenation, filtration and tank maintenance (i.e. regular water changes)