Hi,
I bought a 20 gallon saltwater aquarium about 10 months ago from someone off craigslist.com. I didn't know what I was getting into! (I keep freshwater mostly) When we got the tank it had no fish and a nitrate level of 160 ppm, at least that's as high as the range goes on my test kit(nutty). Anyways, after about a billion water changes I got a, Round Goby, Ocellaris Clown, 6-lined Wrasse, and a rosy bubble tip anemone. After things like pH drops, bad advice, and evil filters(flame), I lost the anemone (as well as a condylactics), the clown, and the wrasse (it jumped ship), and upgraded to a 29 gallon BioCube, and gained a Toadstool Leather coral, Montipora Capricornis, Banggai Cardinal, Red Banned Snapping Shrimp, and a Skunk Clown.
So, now I'm working on setting up a 55 gallon. I just wanted to get on a SW forum so I can get some advice.