I bought a new cleaner shrimp on Monday. On the way home, he molted.
Three days later, and he's still hanging out under the rockwork. My parameters are Ammonia 0, Nitrate 10, Nitrite 0, pH 8.2, Ca 480, SG 1.021.
My other (R.I.P.) cleaners would come to the front of the tank and battle for food...