+ Jack's Magic Pink = HEDP

+ Ascorbic acid can remove iron; but you MUST have the polyquat to use it. Chlorine destroys ascorbic acid almost instantly, so you have to dechlorinate your pool to use it effectively.

+ Muriatic acid lowers pH, but low pH + HEDP *tends* to dissolve iron. However, ascorbic acid WILL dissolve iron stains, so since you have that, you can plan to use it.

+ Re: cloudy water -- test your filter with DE, per note #d above. Your filter may need service. If so, that needs to be fixed before you try to remove stains.

+ Re: iron source -- other possibilities include low grade pool salt, if you have added salt; OLD iron water distribution lines; iron lines in VERY old swimming pools (pre 70's). Do any of these apply to you?