Ear stretching salt soaks?

I know you're supposed to use sea salt, but I don't have any. I found two morton salts in my pantry and one says iodized and one does not. I know it's the iodine in regular salt that makes sea salt better, so is it safe to use the one that doesn't say iodized for a salt soak? I was going to put in my 2g but when I tried, my ears started hurting and I left my 4g's back in and I've been doing mages with bio oil. Any other suggestions would be helpful and appreciated! I bought up to a 00g and I want to do this as quickly as safely possible