So my cleaner shrimp are dropping...one by one

ahullsb

New member
I've had two cleaner shrimp, and a fire shrimp since 2006. Two days ago one of the cleaner shrimp disappeared. Today I see the other one dead on the sand bed, and the fire shrimp is nowhere to be found. I really don't know what could be happening. Any ideas? I just tested and

Salinity 1.025 (refractometer)
Ammonia 0
Nitrite 0
Nitrate 0
Alk 8 dkh
calcium 360
PH 8.2

Anything else that I might need to test for?
 
I haven't added anything for a few months. I have a rosy scaled wrasse and a mystery wrasse. Two B&W ocellaris clowns, chromis, and a yellow watchman.
 
I am just trying to make sure that I am not missing something here, or that they aren't the first signs of a larger problem.
 
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