Most people are fine having CPD's and adult shrimp. I currently have 8 CPD's with a small colony of RCS and CRS and they're starting to take off. The issue comes with trying to breed shrimps and getting a sizeable population going. Having a densely planted tank helps but they'll wiggle their way in the plants and get the shrimplets. It's mainly harder if you have a smaller starting population but once they get going it'll be alright, just don't expect having a ton of shrimps lol. Chili rasboras are better, green neons, etc.
