
You've got a lot of good advice to start with but you need to do some reading. Look up South american and central american cichlids and you'll be able to find some you like. Personally I'd never put a firemouth in a 30 gallon tank.
When your planning what you want to have make sure it can spend its entire life in your tank unless you're absolutely sure you can afford a bigger. properly sized tank for the species you choose. Take into account agression, compatibility with other species, water requirements and natural habitat.
A little homework will save you tons of time, MONEY, and headaches. Learn first before you buy anything. You will be caring for these fish for their entire lives which in some cases can exceed 10 years.
If you're going with a 30 gallon 36" tank. I'd start looking at dwarf cichlids such as kribensis, and apistogramma. They will teach you a lot about cichlid behavior, and to your benefit, fish keeping responsibilities in general. Water changes, filtration requirements, etc etc...
God I'm starting to ramble on...
Bottom line is LEARN FIRST, then buy
GOOD LUCK and welcome to the hobby and to our forum!!
