My girlfriend and I were thinking of getting some fish as our place does not allow for other types of pets. Upon looking into it her prefered type of fish is a betta while I like pelcos. I did some looking and it seems the can be tankmates, my question is would a 5 gallon tank be to small or should we try to include other fish into the tank? Or maybe get a bigger tank altogether? I want to do my best for these fish and not over crowd or anything else to cruel to them. Thank you to those who read this.