If memory serves, DE will filter blood. May be hype, I don’t know.

My DE filter was in place when I bought the house so I never knew any better. If does a fine job of filtering but there is a mess factor when back flushing or cleaning.

I started using an old bed sheet taped to the back flush hose to catch the old DE. I threw the sheet away but I recently heard that DE can be used to repel insects.

So, it could have a second life sprinkled around your foundation. Maybe that is what is in Seven Dust. Hmm..