Add your FO* or EO* to the dendritic salt first and mix well, then add that mixture to the other salts and mix well.  You can use a large rubbermaid or tupperware bowl with an airtight lid so you can shake them up good. 

*Make sure to use a LOTION SAFE fragrance!  Remember, people will be soaking in the bath salts for extended periods of time, so make sure the fragrance or EO's you choose are safe for long term use on skin!

You can tweak this basic recipe any way you like... add baking soda, powdered goat's milk, crushed herbs like lavender, chamomile, peppermint etc, loose herbal teas, citric acid to make fizzing salts... possibilities are endless! 
*Note:  When adding herbs or tea, remember these can make a mess in the tub, so you may want to package these in organza bags as a bath salt sachet... the salts will dissolve into the water and leave the tea leaves in the bag so there's no mess

Packaging Ideas:  You can use cello bags for a standard look, or for a cute country/prim look put a clear poly bag of salts inside our Kraft Brown window tin-tie bags!  Or for a more upscale presentation of high-end salts you could use our Oval Cosmetic Jars, or our clear plastic Votive Tubes!  *The votive tubes do not have a tight fitting lid, so clear tape is recommended to avoid spilling.

Various glass jars can be used also, but keep in mind many people don't like glass in their bathrooms in case of breakage on tile floors.  You can also package your salts in a bag or jar with a cute wooden or plastic scoop tied to the package, or even put a seashell in the container for a scoop! (Make sure to sterilize the shell in bleach water first just to be safe & clean).  If using teas or herbs in your salts, try making Bath Salt Sachets and package them in Organza Bags for single bath use!  Very cute and upscale!