I have to admit, being from Malaysian where you can catch them in ditches & rice paddies (at least when I was a little tyke), I have a weakness for common guppies. That's why for my b-day I set up my little 5g to breed them.
I also used to keep balloon mollies, but I converted them over to full SW over a period of several weeks. When I traded them into King Ed, the owner saw that they were selling for twice the price so he caught up a whole netful & tossed them in his SW tank, with predictable results. I wasn't there so I couldn't stop him from shocking his FW fish like that.
