Hi,
I don't know whether in your country do sell crystal salt or rock salt. Where this salt are originally from the sea. It is very common to Asian and some westerners to used it for foot soaking.
Let me tell you how does it works. I have been foot soaking for past 6 months and it does WONDERS! You just need a to foot soak for atleast 15 minutes and if possible add some symbols in it to cleansed our body. It will really clean our negativities in our body and it work faster for those who having sleepless night. After foot soaking you will encounter yourself better in health as well as when you do meditation or reiki it really felt the different.
You may try it and share your feedback to me.
Love & Light,
Emelia