I just started my first SW
tank few months ago. Mines a 55g tank. Research fish first, make sure the fish you want will be okay in a 55gal. That way if there's a fish you love and gotta have, but it needs a bigger tank, you'll know that ahead of time. After you decide fish you want, then decide if you want sand, crushed coral or bare bottom tank, based on what your fish will need. I have a Fluval canister filter rated for 100 gal
, most people on this site will say you should do sump. I also have aqua c remora s skimmer, works great. I've had no problems with algae so far. (fingers crossed) Mine's a corner tank, so no room for sump. you'll need powerheads, I have 3 in my 55g. Heater. I have Kessil LED
light and I love it. My 55 took about 3 weeks to cycle, and I used "live" sand and live rock. It's a lot of work to get it started, but I LOVE SW
Research A LOT. That way you don't waste your money. But don't forget to have fun!! It's a great hobby!!