This pool deck had stains caused by banana sap. The area covered a dozen tiles. We were able to remove the stains and seal the tile with a penetrating high quality sealer to protect the floor from the salt, sun and water that are relentless on the exterior natural stone tile.
Article: Professional Stone Care - An Investment that Pays http://eurotechmaui.blogspot.com/2010/11/professional-tile-and-stone-care.html
Article: Should I Use Bleach? http://eurotechmaui.blogspot.com/2010/11/floor-cleaning-to-bleach-or-not-to.html
For Service, call Eurotech Maui 808.877.0222