Idk what's going on

What kind of shrimp?

Are you sure your Nitrates are actually 0? That would be pretty rare to see, especially in a cycled tank.

Also, how new is your tank- and what kind of shrimp?

does the shrimps look milky and death everyone other day? it's most likely bacterial infection.

yes what kind of shrimp, how old is the tank, any new additions to it? I suspect TB or CRS with those parameters, and if so I maybe would lower the temps a little, and maybe the TDS and GH. I never had luck with CRS or Tb over 190 TDS and GH of 6. I have had good luck with them in PH from 5.2-7.0 but those other 2 not so much

These are crs/cbs. Tank is already cycled for about a month already.

Julianzh if it is what is the safest method of treating? The ones that are dying have like a broken pattern of colors not nice vibrant colors. So yeah I would say milky white and yes every other day

I am a fan of marycn 2 if you can get your hands on it.

Oh that's easy haha thanx steve