not sure...........but.........

The book does suggest playing a bit with the ratios of salt to water. I am no expert but if I were in your boat and couldn't drink the whole amount, it makes sense to just drink 1/2 quart with 1 teaspoon of salt.
Let us know how it works out if you decide to do it. I personally have had great success with the SWF (Salt-Water-Flush) but it is not for everyone.

You might also want to post in "Ask Shelly" forum & Bowel Cleanse Forum (ask for PTree in bowel cleanse....she is very very knowledgable and I believe aan advocate of the SWF). Good luck to you! Tweet