Marshall Dudley, I have been reading and appreciate your post, however, the Pool Filter DE is the different type and is saltwater sourced and does have the silica crystals which are heated to create the larger clumps apparently to enhance the filtration process. The Perma-Guard that you list as a source is mixed and not suitable for ingestion by people. All that I have purchased in the past has just been labeled as Diatomaceous Earth with no use specified. It has worked GREAT for pest control of all kinds. Bill Keen
Marshall Dudley <[email protected]> wrote: Bill Keen wrote: Terry, Check your facts. There are no crystals in DE. It is a naturally occurring calceous product of organic origin and is not processed. No, DE contains crystalline silica. If it didn't then it would not work, it is the source of the sharp crystals that kill the
