Hi, I would like to know what is the best fish to breed in 10 gallon for profit (and also just for fun)? Also what is the fish the most in demand right now? I would like to do shrimps maybe or panda corydoras but for these the parents would be in a 30 gallon. I would love to breed paradise fish but I don't think they would sell. I would like to know all of your opinion and suggestion!