abso. acid treatment didnt change chemicals. is this normal?

[rsharp]

i treated my pool today to remove iron stains. I used Natural Chemistry products. Stain Free and Metal Free. i did the treatment early this morning and have tested the water several times since. my chemical levels are:

FC-0
TC-0
Alk.-90
Ph-7.2
CH-75

since ive added the stain chemical this is the reading i keep getting. i will tell you i added baking soda yesturday to raise the Alk. (it was 70). dont know if this is the cause. the stain is gone so is it normal for your chemicals to be fairly ok...(CH has been low all summer)or is this out of the ordinary?

 

[JasonLion]

Stain treatments will wipe out all of your chlorine. You need to add chlorine very slowly after a stain treatment and it might take a while before you can maintain an FC level again.

Other than that, your numbers look fairly normal.