Help with White Widow

I noticed my fan leaves started with several of these little yellow dots all over the place. In on my 5th week into flower and don't know if this is just normal as the plant nears the end or what. Any advice is appreciated.

Happy frog soil mix
1000W led light
Indoor grow
No pests noted

Looks like the beginning of a cal mag deficiency-
The FF may be running out of juice

Thanks...

I would look closely for spidermites.

Actually they are plainly visible in all pics.

Remove affected leaves and get them out of the grow then treat.

Doesn't hurt to vacuum the leaves first and cut leaves off directly into a plastic bag to reduce spread. Don't forget to empty vacuum outdoors.