I have just started with this a few days ago, have not noticed any flecks yet, but here is my 2c worth.I do have experience with ionic cell cleanse foot baths which, through osmosis, draw toxins out from the body into the water, amazing stuff! If black flecks come out , they are supposedly heavy metal toxins. Just black color in the water signifies toxins from the liver, etc. I don't know if I am taking a quantum leap here in theorizing that the two different systems of detoxification may show up similar visual evidence, or if the black flecks in your toilet mean you are finally looking where you normally don't and you now see what you normally don't??? (:
Would be great to get the real answer...