canning salt has best results . Iodized can be used safely but quality can suffer. Flake salt not recommended. Water/vinegar ratio should be at least 1:1 for safety, but vinegar can be increased if desired. Sorry typing one handed...have dog on leash next to me w/cone of shame on.
https://nchfp.uga.edu/how/can_06/salts_pickling.html