Thanks Jfh and Solstice Goat for your advice and opinions.

I've never used DE, but I definitely wouldn't want to be bound up from the silica.
I'm not having any issues that demand a colon cleanse, but I was thinking that maybe I needed one, been around ten years at least since I did a couple of Colonix cleanses...honestly, I wasn't impressed with the results. Using psyllium husks and the occassional Cascara Sagrada does the same thing for me.
I was reading about how the clay scrapes the sides of the colon, and I thought that was a good thing, as nothing I've used had that ability. But I may just hold off on the colon cleanse for awhile, may not even be needed.