Please post some kind of evidence of your idea that splenda "kills candida". Just "not feeling well" when eating it is nothing - people also do not feel well if they eat dirt from the yard, this does not by itself mean that "candida is dying". If there was some other evidence, then sure the "not feeling well" might hold some weight, but by itself...
A study that showed that less splenda came out in bowel eliminations than the subject people in the study were eating does not mean that the rest of the splenda "was used by bacteria and candida in the body" - lots of toxic substances are stored away in the fat cells and other areas of the body for YEARS, thus are not eliminated in bowel movements in the same volume as taken in. Example: mercury.
So...any evidence out there for your theory? We would like to know.