What kind of pet fish should I get?

in a small tank with a filter say a 10 or 15 gallon find some female betas they are much like male betas but get along together alot better so you may have 6 or so in a tank and still enjoy it. also a pair of cory catfish will help clean your tank and ya thats about it. do regular 25% water changes each week AND BE EXTRA SHURE TO CONDITION THE WATER BEFORE YOU USE IT!!!!!!! unconditioned water will stress and may even kill your fish!!!!