Depends what kind of saltwater tank you want a fish only, fish only with live rock, or reef. Also depends what you mean by whats it take. You talking specific equipment or money. If you choose reef tank the it also depends what type of corals you plan to keep. Softies, lps
, and/or sps
29g Mixed Reef, 150w 14k Phoenix MH w/ Moonlights, Reef Octopus BH1000 HOB Skimmer, Ecotech Vortech MP10es, ReefKeeper Lite (Plus), PH Probe, Temp Probe, ATO, Carbon/GFO Reactor.