  Well, I have just started a saltwater aquarium. It's a 65 gallon tank that came with an oak stand/cabinet. I got a power filter that hangs over the side, a heater, and a hydrometer. I haven't gotten a powerhead yet, but I plan on getting one of those in the next few weeks.
I'm also going to get a protein skimmer at some point. I got some crushed coral for the substrate. Cleaning that stuff was no fun. And even after I cleaned it, when I put the water in the tank, it made everything all cloudy. I got a few pieces of rock(not live rock) and some sea shells. I left it running for a week, made sure the specific gravity was right and all that mess.
So, a week ago, I went to purchase my first fish. I had read up and I thought a couple of damsels would be perfect for cycling my tank. WRONG! One was bullying the other one terribly. He was bigger than the other one, and would constantly chase him, and not let him swim around in the tank. So, I took the bigger one back. And, I just came home with two green chromis, and a piece of live rock.
The fish store guy said the live rock would help the cycling process. Right now, the fish are getting along great, especially the two chromis. They love each other. I don't know how the yellow-tail damsel is going to get along with them, but it seems like it will be okay. 
