Sea salt spray

So I want to make a sea salt spray and I have found everyone dilution here but am still unsure what kind to buy. My local supermarket has a bunch and I noticed that some still have iodine in them. Any recommendations on what brand and where you got your sea salt from?
updated by @vwpimpin: 01/13/15 09:51:15PM

1 withoit iodine u can get it cheap from aquarium stores

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My new book Ban The Taboo Vol 1

This was all they had. I just want to make sure because they had plain bags marked for fresh water also? If the picture doesn't show up, it is instant ocean.