I have about 20 Red Cherries in my 30 gallon w/ RTS, Gourami, Neons, Cordys, and Mollies They do fine..... they even breed. Most babies get eaten, but a few survive. I might lose one or 2 when they molt, and I look in there, and only see a couple, but then the next day I see like 15. They hide VERY well, and in a planted tank, not only do I believe they will strive, but they will breed!
Try them. I got mine from PsiPsi on eBay, and he is awesome. Just in case you dont have java moss.... they LOVE it (hornwort too).