woah..I just read back through more of the posts on this thread..
I see you are 10 years old..
PLEASE dont even consider starting fishkeeping with a salt-water tank!
start with a fresh-water tank instead.
not because you are 10 years old, thats irrelevant...I would give the same advice if you were 50 years old.. but because anyone who hasnt kept fish of any kind before is MUCH better off starting with freshwater..its SO much easier! (and its not all that easy either! it takes some experience and learning to "do it right"..)
If you havent yet, please read through this thread:
Do my fish have Ick?
for some of the trials and tribulations of starting up a new freshwater aquarium.
Start with a 29 gallon aquarium to do it right..(or larger if you have the money and space)
Another thing that wasnt discussed much in this thread is the sheer amazing $$COST$$ of doing a salt water tank..
you are talking $2,000 just to get properly started.
You can set up a nice 29 gallon freshwater tank from scratch for $250.
even less if you look for used aquariums..which are actually pretty common, because many people give up on the hobby after awhile.
probably because they dont know how to do it right and get frustrated with failures..there is a TON of bad advice and misinformation in this hobby..
but its not hard, and its very rewarding, once you get the hang of it..
check your local craigslist..This one in New York City popped right up:
$125 for a complete 29 gallon setup..
thats a good deal.