There are no "Cherry Red" shrimp. There are "Red Cherry" shrimp, though. CRS = Crystal Red Shrimp (Caridina) RCS = Red Cherry Shrimp (Neocaridina)
Your GH is too low for your shrimp (you want at least 6 GH) and the KH is potentially too high for the Crystals and Taitibees.
The Cherries and Ghost shrimp can do just fine on sand or gravel substrate with at least 6 GH and a pH of 7.0-8.0. but the Crystals and Taitibees would do best on a buffering substrate with remineralized RO water using GH+ only minerals. Ideally, you want a KH of 0-1 (typically 0, but 0 and 1 read the same on the API tests), or a max of 2, with a pH of 5.0-6.8.
Would recommend setting up a separate tank for your Caridinas so they can live in preferred parameters.... unless they came out of Neo type parameters?
Do you know the parameters they were raised in?