I recently did the AA treatment on my fiberglass pool to get rid of iron stains.

Now they are coming back. I've been using sequestrant but I cannot find anything in Canada that this forum recommends. So far all I've found is stuff that doesn't tell you what it is, Lawarason COP-OUT which is EDTA, and GLB Sequa-sol which the manufacture tells me is a combination of Sodium Citrate and Hexametaphosphate.
Jack's Magic doesn't have any dealers that carry Pink Stuff in my area nor can I find a source for Proteam metal magic nor any other HEDP based sequestrant.

Any fellow Canucks on here figure out how to get an HEDP based product up here?
I'm located in Ontario Toronto/Hamilton region.