Using HydroPureTech cartridges to deal with Iron

[BJohnston]

PoolDoc,

I thought that citric & ascorbic acids basically worked and behaved the same way, abeit ascorbic acid was more efficient? Just curious on why you recommend not using citric?

I guess I should clarify why I said "citric" acid. I wanted to use Natural Chemistry's "Stain Free" which they advertise as *100% citric acid* maybe this is simply a mis-labeling? They also have an Extra Strength that they say is 100% ascorbic acid.

Sorry to give the wrong impression earlier... I understand the differences between "removing" and "dissolving" the iron back into solution. I also understand that once the citric or ascorbic acid is applied, the iron is still in my water and can "fall" out of solution again and re-stain things. I do not want this to happen. I also understand the incompatible relationship that chlorine and these acids have with one another.

I am interested in hearing more on your method for using cal hypo to remove iron and for how it will effect my calcium numbers. I will have to re test to see, but the last time I checked, my Calcium was up around 290.