Splenda is ok for a candida sufferer to eat. There are some people that say that it feeds candida, but that is something that has yet to be proven (those who have problems with it are probably either allergic to it or it is aggravating their digestive system). Try a bit and see if it affects you. I am on Atkins, so I eat splenda-sweetened foods all the time and it doesn't hurt me. However, everyone is different, so it may or may not affect you.
Good luck!