I found this recipe on a website and I LOOOOVE it.
2 cups epsom salt
1/2 cup sea salt or rock salt
1 cup baking soda
1/2 cup citric acid
This makes about 2 lbs for fragrance/essential oil calculations.
2 cups epsom salt
1/2 cup sea salt or rock salt
1 cup baking soda
1/2 cup citric acid
This makes about 2 lbs for fragrance/essential oil calculations.