i checked out your link and the black specks picture made me think of Shelley's (ask Shelley forum) list of the different colored particles that are left behind after taking a detox bath and what the different colors represent. the black specks, according to that list are metal toxins. the other pix of the fibers etc. are quite eerie to say the very least!
have you tried Shelleys detox bath at all? it's quite powerful stuff. you can find the ingredients and directions on how to do it in her forum in the FAQ's section at the top of the page. i'm curious to know if this might help at all:)