Gwen's exactly right about marine tanks requiring more work. I used to live with a family that gave me a free place to stay in exchange for taking care of their dogs and fish. They had 3 dogs and one 200 gallon marine tank. The dogs were easy compared to the tank. It required daily cleaning and maintenance of the plants and the damn Sea Horse was a pain in the ass. He wouldn't eat IN the tank, I had to remove him to a 5 gallon bucket and drop some guppies in for him to chase until he was ready to eat. Never will I have a Sea Horse as a "pet."
Cos, get a 10 gallon fresh water tank. They are relatively cheap and can be found anywhere. Check out Fish World in Raleigh for everything you ever needed to know about fish.
http://fishworldnc.com/home.html A 10 gallon is just big enough to keep you daughter and yourself entertained. Then you can decide if you want to go bigger. Just like racing, start small until you decide if it is really for you before you go big.
Fresh water fish are much cheaper than marine fish also. Golds go for a couple of bucks each, if that. Tetras are real cheap also. For hearty fish, Swordtails are good. They are cheap and will help condition the water before you get something prettier. Don't forget to get a Plecostomus to help keep the tank clean.
That said, I do know a guy who has a 125 gallon marine set up for sale. It is currently dry but has everything aside from live rock to get it going. Just think, in about 6 months you too can have a big tank with a couple of fish that aren't dying every week or so!!
Here's a deal at Petsmart for a 10 gallon set up. Just add fish!
http://www.petsmart.com/product/index.j ... Id=2754151
