I see no reason to go straight to a bactericidal substance used in the enemas.
There are alternatives such as Sodium Bicarbonate and Nystatin. Any acid substance will have an impact on the bacteria living in the colon. I don’t know until what degree the water also remove flora.
Anyway, I have no doubt many people get results because they may need to remove or kill some troublemaker bacterial species which have growth in the colon.
It isn’t only candida species that may growth there but a bacterial infection may also cause serious symptoms.
The fact is the enemas bring fast relief and is an effective method to control the biggest part of the infestation.