i Loved it but,it didnt take very long at all for it to get black algae on it.  a neighbor told me to put it out in the full sun to kill it and then sweep it off with a broom. i cleaned it best i could and gave it to the same neighbor. i dont understand if a carpet is an outdoor carpet ... why it would get black algae so quickly.  My back patio is in the shade but i thought outdoor carpets were treated plus made of special fibers for outside so that it would resist mildew or algae