Next year I will be moving into a small dorm room in New York. Provided I can find a caregiver for him while I am at home, I want to buy a male betta. Normally, I would opt for the maximum space, but sadly, I won’t have this luxury next year.

Can anyone suggest an inexpensive tank set up that would be reasonable for a betta?

I am using a PenPlax filter in my current betta set-up*, and it seems to work well enough. I would like to find a tank that is both compact and ergonomic– yet will still have sufficient space for a filtration unit

*
http://www.petco.com/product/12147/Penn-Plax-Small-World-Pump-and-Filter-Kit.aspx

I already have a lot of the equipment when it comes to gravel, lights, and air pumps (It feels like I’m starting an air pump COLLECTION)– is there an attractive desktop aquarium out there that doesn’t require me to buy the whole kit?
I also love the look of Mini-Bow and tanks, do they come in 5 gallons?

Mini Bow
http://www.petco.com/product/10313/All-Glass-Mini-Bow-2-5-Little-Lagoon-Starter-Kits.aspx?CoreCat=FishFC_Tanks

Sea Candy
http://www.petco.com/product/11266/Red-Sea-Candy-AquaVase-Combos.aspx?CoreCat=LN_Shopping_FishSupplies_BettaShop
I have also heard good things about Art Nano Filters.

http://www.petco.com/product/12148/Red-Sea-Deco-Art-Nano-Filter.aspx

Does anyone have experience with them? I read they don’t have carbon. Is it still ok?