A cherry shrimp seems to be doing well, but looking a bit haggard
So I have a particular cherry shrimp that has been in my tank for 5+ months now. The pet store had typical tap water parameters of high GH, high KH, high pH, high TDS. My tank has GH 6 KH 0-1, pH mid 6's, etc, which are more for Caridina parameters, but whatever. After a slow acclimation, the first month its colors were messed up, i.e. it was more of a clear maroon color instead of solid bright red. But after that, and for the next few months the color stabilized and became more of a solid bright red, but with a pink stripe on top. (I'm willing to blame that on my water parameters.) It lived on an over-fed diet of various shrimp foods every 2-3 days or so, e.g. protein this, mineral that, Complete this, etc etc.
Starting about a month ago I had an overfeeding-related disaster which polluted the water, so I cut way back on the feeding. This seemed to help out, as now it became more active and is usually grazing on the various plants and moss around the tank. However, it's appearance got worse again. The color got darker, and the shell, after this most recent and successful molt, has more of a wrinkled and shriveled appearance. My best guess is the change in diet, since now it eats mostly biofilm and algae, and doesn't really care much for the shrimp food any more. The other shrimp (a blue bolt and two amanos) seem to look and act fine.
Anyway, I add here a picture of this shrimp approximately at the 2-3 month mark after its color stabilized.