Anyone know what would cause this staining - Jandy Light

[beeaton]

So, I am seeing some stains that are around my Jandy LED light (JLU4C9W100) that is orange in color. The light is located in the raised spa. There are 2 other lights in the pool that do not have this issue. Anyone have an inkling on what would cause this issue? Is it rust?

I've tried to scrub it with the pool brush and it seems to help, but can't get it completely removed.

I test daily with TFT100 and keep it pretty balanced.

FC 2.5
CC 0
PH 8.2
TA 60
CYA 30
CSI 0.3

 

[ajw22]

Your water is not pretty balanced. FC is low for CYA 30. See FC/CYA Levels. pH is high. CSI is high. No CH posted.

Your signature says you have a Nature2 system. That active? That puts minerals in your water. You could have staining from metals or minerals. Have you put any algaecide in the water or products with “blue” on the label?

What tablets are you using?

 

[JamesW]

It's rust from something behind the light or in the plaster.

What is the make and model of the light?