Let think about how candida colonies live in the colon.
The colon walls are covered by a mucus layer. It is on and surrounded by this mucus that candida create colonies. The mucus is where candida colonies stick.
Those colonies aren't Spyderman, they can not attach strongly to anything inside. Some of them, a few in my experience, may reach the epithelium an feed with blood. The biggest amount is floating on the mucus layer.
The colon is anaerobic boosting the resistance of candida albicans. Inside the biofilms, it is also anaerobic. Water is rich in oxygen changing the things to aerobic temporally.
Also, doing the enemas, you are cleaning the pipe, allowing the water to touch the walls and to remove mucus.
I compare it as a having a Tsunami inside the colon. The water penetrates deep, later when you evacuate it, your colon muscles will push out. Imagine the water pressure those candida colonies have to face. At least, they be attached with anchors, I don't see how they can be inside. Of course, this isn't one day process but months. Remi96 was doing it for several months until she was cured. One of the last time she posted, she was eating pizza.
Remember, what have you severely sick is the amount of toxins those colonies produce. Those toxins are also responsible for the immune suppression that affect us.