This somewhat explain the benefits of alkalinity vs. acidity, which really has nothing to do with treatment of bacterial overgrowth which is underlying the pouchitis situation of many:
http://www.vitalitylink.com/ar...-alkaline-body-water
On the issue of bacterial overgrowth, I have observed that many of the probiotic drinks on the market contain apple cider vinegar as an ingredient, which is presumably on the theory that a more acidic bowel, while possibly impacting on cell structure long term (see above article) also reduces bacterial levels.
I do not see any correlation between alkalinity or boosting alkalinity and fighting bacterial overgrowth.