That's a loaded question. If you want to raise them, it's quite a bit of work. Left alone, the chances of any surviving is basically zero.
If you want to look at my journal here: http/www.fishforums.net/index.php?/topic/307299-little-nemo-diary/
I have basically all of the information there on how I'm raising my False Percs. It would be nearly identical as tomatoes. If you are dedicated to raising them, buy some books, they're an invaluable resource.