Is this a molting problem?

[cueball]

Hi guys. Lately my few of my shrimps have been experiencing this symptom per picture attached. They usually remain active and feed for a day or two before passing away. I still see molted shells in my tank and other shrimps remain active. However the number of such deaths has been increasing lately. I will probably get my hands on a Gh kit to rest for hardness. But is this a molt problem? or some other problems related to water. Hope someone could help. Thanks

[newlife]

Do a test on your gH 1st...

[reiner09]

can't really tell(but from the looks of it it might be) .. a test will be more concrete...