You already have the 10 gallon? If so, too bad - you could solve a lot of the problems you'll face with a 20 gallon setup instead. For one thing, a 5 gal water change makes more sense (good idea Can_Man), and a 24" PC light fixture can be had for cheapo. Esp if you find a used one - these range from 110-130 watts and will light up a 20 just fine.
Lighting a 10 properly is a bugger, and keeping it stable is a bugger, and running out of room is a bugger, believe me...
Had a 10, a 15, and a 20 - my new nan0 is a 29.
Aaahhh... room to breathe.
