Can someone tell me if this is a molting?

[myswtsins]

Thanks for your response. I sure hope it is because if I lost another female that leaves me with just 1 female left. I have not seen the female in question yet today but they are good hiders!

Took some tests...

Ph-8.0
Kh - 12
Ammonia - 0
Nitrites - 0
Nitrates - less than 5ppm

Is there anything else I should test for that would affect the shrimp? (My API Gh test kit doesn't work for some reason)

Parameters in bold. They are the same today too except the nitrates are maybe 7ppm & it is water change day! I have not started dosing ferts in the tank yet either although my plants need it, lots of yellow leaves.

I feed algae wafers or shrimp pellets daily with a weekly veggie. I feed them pretty well (as if my fat female didn't make that obvious) because there are quite a few snails in there too.