Originally Posted by willanderz
So here's my list of questions
1. How big of a tank
2. What do I need for a reef tank
3. How do I set up a sump
What fish do you intend to keep? If you like tangs, then you want a 6' tank. A 125 would be the smallest I would go, but a 180 is a better choice.
What do you need for a reef tank? You will need a reef ready tank, a sump, lighting for both, live rock, a good quality protein skimmer, power heads for flow inside the tank, a refractometer, and test kits.
A sump is just an extra container of water to increase total water volume and keep many of your components in, like your skimmer, any reactors, and possibly a refugium. What exactly do you want to put in your sump?