Skunk shrimp died

[Cheems]

So I got a skunk cleaner shrimp around just over a month and a half ago now for my 29 gallon tank

And recently he died, I’m not sure why as I tested my salt 1.026, and tested the tank, 0 nitrate, 0 ammonia, 8.0-8.2 ph

Only 3 things stood out to me as far as causes go.
-I was treating my tank with ruby rally pro as a antiparasite medication as I had brooklynella around a month before this incident, the tank was high in ruby rally pro concentration
-the shrimp had small white spots along his body, quite a few and some varied in size slightly
-I recently added a yellow stripe goby around half a week ago

 

[Cheems]

I’m doing a 20% water change as we speak so I can eliminate the chance if it was the high concentration of ruby rally pro so that it cant affect any other fish

Stocking is:
-2 mollys that I added for black molly test
-2 clownfish
-1 yellow stripe cleaner goby

 

[Cheems]

Bump