Cherry and crystal shrimp don't do well together, because they need different water conditions. Crystals prefer acidic, softer water, Neocaridina [ cherry] need hard, alkaline water. But there other species you can keep with cherries. One is the Sunkist shrimp, a Caridina species that is orange, same size, same water, but different species, and can't cross. Also has larvae, so getting baby Sunkists is unlikely.
Babaulti shrimp come in green, and sometimes other colours. Also same size, same water conditions and they do have live babies like Cherry shrimp do. Nice little guys to have.
You can also get Fan shrimp, which are filter feeders. Several species, mostly larger sizes, but extremely peaceful. They have no claws and don't fight with anything. Bamboo shrimp, can get to four inches. The smallest fan shrimp is Atyopsis spinipes, and that one comes in at least 3 forms. Golden Fan shrimp looks exactly like a Bamboo, but is the size of a Cherry when grown. Wild form is the same size, usually pale yellowish, with faint striping on the sides, smaller fans. I forget the other one just now. Can all be kept together, I've done so for years.
There are other fan shrimp too.. Vampires, very shy, get to five or six inches, again, very peaceful, oh, and there's Green lace, that's the other A. spinipes I couldn't recall.. females are about two inches long with a neat green pattern, the males are tiny, smaller than cherries, with a completely different pattern.
I've kept all these, as well as Amano and Ghost shrimp, in one tank, and they all get along. Though Ghost and Amano shrimp will, on occasion, eat a new born or very young cherry or other juvie shrimp. IF they can catch it. Give them plenty of hiding places, plenty of plants, and very few will be eaten if you get Ghosts or Amanos.
You do feed them, of course. They don't need much so avoid overfeeding at all costs. They can in fact live for a month or more with no feeding at all in an established tank. Mine always really liked shrimp pellets.. which are not made to feed to shrimp, but are made OF shrimp, for fish. Being scavengers, shrimp are happy to eat anything dead, including their own kind. Normal behaviour for them.
Fan shrimp all have larvae too, so you won't get babies from any of them, sadly. But they can live quite a long time, five years or so, where cherries average about 1.5, maybe 2 at the outside.
Edit. Sorry, my goof. Green Lace Fan shrimp are not a variant of A. spinipes.. they are a different species, Atyoida pilipes.
