How are you disposing your DE?

[cleancloths]

I just pump mine out to my drainage pipe -- no comments on where that goes

[Rbrenton]

DE is said to be used as part of the diet of Ostriches (I guess those that are farmed), so I doubt there is any danger.

My backwash pipe goes out about 10 feet into the grass, where everything goes. In 9 years of doing this, there has been no effect at all. In fact the grass is thicker there than anywhere else.