I keep hearing they're pretty useless for dealing with algae, because of not wanting to wipe out what they perceive to be their only food source. But hells yeah they are way adorable, I love these guys.
I recently got 8 RCS for my 20L (I meant to get 10, but the store was lacking). I have an abandoned 1.5 that I'm planning on setting up as a species tank for the little guys, so they can breed safely, and maybe I'll set up a desk shrimp so I have someone to look at during most of the day. I have a big ~1L vase that I failed to turn into a mini-riparium, so I think I'll use that, but not fill it all the way. Any advice?