Salt comes in different colors. I have even seen pink salt.
Elisha healed the bad water with salt, 2 Kings 2:19-25.
Moses healed bitter waters with a tree, Exodus 15:22-27.
An angel healed the waters, John 5:4.
Waters will be made bitter in the future, Revelation 8:11.
Healing water in the kingdom, Yahzeqyl 47 and Revelation 22.
Yahoshua is the healing water, John 4:14.