Hey everyone, I've got this little guppy breeding tank set up where 15 fry are and I have now realised that I won't make much off them. What are the best fish that I can get to breed that will bring in loads of money? Also they have to be raised in a tank of 23 or 32 gallons with their parents, unless they can fit in a 5 gallon. I'm selling my adult guppies as well. I would like to try: Neon Tetras (I'm setting up a blackwater tank anyway) Bn Plecos Killifish Blue rams Fish where I have to drop the temperature and bring it back up (goldfish) won't be happening.