I have a quick silly question, that I couldn't find the answer to when searching the Forum.

Does sequestered iron (which if I understood Chem Geek correctly from another post, are iron ions) show up on a pool-store iron test?

I'm Dianna (labdi01) - the one with the homemade quilt-batting filter ("New Pool Owner Manually Removing Iron"), that we ran for 72 hours after shocking turned my pool opaque brown and it cleared it up beautifully.

I went to pool store today to have water tested and they told me I have 5 ppm of iron, when my pool is perfectly clear, numbers mostly where they should be.

CL - 3
FC - 3
pH - 7.2
Alk - 130
CA - 50 (told me I had to bring it up w/ 10 lbs of Balance 300 - I ignored him)
CYA - 100 (claims that's fine - I understood this to be a problem from the Forum)
Iron - 5

I came home after this visit and shocked w/ 2 lbs of HTH Super Shock and Swim, with the intent of knocking any sequestered ions out in the open to be filtered, and my pool remains clear (it's only been about 10 mins after shock).

Could either or both of you shed some light on the iron result?