biologically sourced metal

[waterbear]

There may be ways to precipitate the iron but I think the point Ben is trying to make is "why bother, it's not worth the work and effort".
The point of a pool is to enjoy it.
IMHO, if you want to play around with strange homebrew filters, ORP and pH controllers, Zeolite filter media, etc. then set up a few aquariums! That's how I got it all out of my system!

(Not saying that there aren't times when "extreme measures" are needed but lets not lose sight that a pool is to enjoy, not lose sleep over. If the water is safe go swimming, I say!)

Watermom, that homebrew filter will work with brown iron oxide (rust particles) that have precipitated out, which is a different situation than this.

Ben, not trying to put words in your mouth either but I don't believe you will disagree with me.

Purplegirl, just tell the neighbors that you had the pool water tinted by your decorator to offset all the lovely purple designer pool furniture and pool toys then go get a purple pool noodle to float on the water and a purple chair to put next to the pool.