It looks like your GH is way too low, close to 0 looking at your photo. GH is dissolved calcium and magnesium in the water. Here is some info [https://www.aquariumcoop.com/blogs/aquarium/ph-gh-kh](https://www.aquariumcoop.com/blogs/aquarium/ph-gh-kh) . Shrimp need calcium to form new exoskeletons. Your guys are probably having a hard time molting. I would add a cuttlefish bone or miracle shell to your tank.
Affectionate-Tooth23 
It looks like your GH is way too low, close to 0 looking at your photo. GH is dissolved calcium and magnesium in the water. Here is some info [https://www.aquariumcoop.com/blogs/aquarium/ph-gh-kh](https://www.aquariumcoop.com/blogs/aquarium/ph-gh-kh) . Shrimp need calcium to form new exoskeletons. Your guys are probably having a hard time molting. I would add a cuttlefish bone or miracle shell to your tank.