Need a lot more information on what kind of a tank you want to ultimately set up. Is this going to be a
FO,
FOWLR FOWLR and inverts, or a reef tank. Each of these setup may require slightly to significantly differenct set up and lighting requirements as well as filtering requirements. No on the air pump for a marine tank. That is accomplished usually with a combination of powerheads and a good filter system.
Next issue is if you want to have
LR in the tank, you need to determine
CC or a sand bed and then the tank also needs to be cycled before you add any inhabitants in it. Sorry for more questions than answers but as you can see it is not that simple and we want to be sure we give you the correct information. I would also suggest you do some research and reading. There are some really great books out there that will describe the various system types, the requirements etc. After reading, you should have enough information there and from researching this board to make an informed decision on what kind of tank you really want and what is involved in setting it up and maintaining it.
HTH 8)