As Liontamer said, "2 Teaspoons uniodized sea salt in 32 ounces purified water."
As far as enemas are concerned, they do not do the job that a SWF does. The SWF gets you completely flushed out from top to bottom (no pun intended). An enema only gives a superficial cleanse to the lower part of your digestive system. Enemas were not thought of well by Burroughs.