I guess the one I'm really suspicious the container of "pucks" -- make SURE they are cal hypo. If they are, and if you are using ONLY cal hypo or bleach to chlorinate AND if you have a skimmer . . .

. . . then there may be a way to remove the iron.

But verify the pucks, first. Bad things happen with trichlor and cal hypo when they get close to each other.

PoolDoc