Hello....I have iron in my pool from using the Clorox branded salt a few years ago. I am trying once again to remove this soon by following the plan i found on this site. However, regarding the sequestrant, I have a salt system but will not turn it back on for a few wks once we get everything under control: algae, chemicals, iron etc. My question is do I still need to use the Purple Stuff made for Salt pools as my sequestrant, or can I use regular sequestrants since I'm turning salt system on later. I'm sure it has salt in the water, but not at level it should due to vacuuming to waste recently. Thanks for the help.