depending on how much you're ready to spend and what type of tank you want to have (reef, fowlr or fish only with no live rock). I would start by getting a tank with stand, possibly canopy, then start looking at lighting. From there you'll want to figure out filtration, canister, refugium or a sump setup, but it sounds like you're going with a sump setup. After that then you're looking at under the tank equipement, pumps, heaters, sterilzers, chillers if needed, dosers, skimmers and the list goes on. I have a simple setup with a HOB refugium and a 4 bulb t5ho light fixture. In the refugium I'm running my heater, a nano protein skimmer (tank is 26g bowfront), with some chaeto and sea lettuce.
