hey i had a 10 gallon nano before until i upgraded, i used a fluval 204 as my sump and i also used a maxijet 400 power head to keep the flow up, i also used a rio nano skimmer (cheap only 30 bucks), and as for light i was using a 20 inch 96 watt pc light for it and my corals did really well, but i don't suggest getting a sea anemone cause very difficult to keep alive in a small tank, and for live rock the more the better lol but usually 1lb per gallon
thanks
victor