My tank is fully planted but may not be able to hide. The balloon rams are small and can get anywhere the shrimp are.I believe Ram will eat shrimp if they have chance. Generally fish will eat anything that fit in their mouth and some will attempt to eat shrimp because it is in their nature.
Is your tank planted tank? Do you provide enough cover for the shrimp to hide?
Well.. I can't say if shrimp disappear due to death or ate by other fish. You could have soft water (low gH) and shrimp died due to molting problem.My tank is fully planted but may not be able to hide. The balloon rams are small and can get anywhere the shrimp are.