cleaner shrimp sick?

[Lord Nano]

my cleaner shrimps antenneas are a bright white as are his front legs but his body is becoming somewhat a duller yellow..... is he sick or is this normal

 

10g nano, water params all 0

 

temp 79.8

 

pH 8.2

[OntarioLiftie]

its normall, or he could be about to shed or just have shed