Sorry, got busy with other stuff for a moment. Here are my cell readings:
+27.07V, +3.82A, 1800 PPM
-27.39V, -3.41A, 1600 PPM
The cell is less than 8 months old, it's a Hayward T-15.
I checked it for scale yesterday. There was some, so ended up cleaning with Muriatic.
Nothing changed after...