Had already tried many things without success. My red-brown composite Steinhof was always white. Have injected in March NELL ULTRA and now after 6 months of the conclusion: 1) There are no more fungus stains should come. 2.) The existing spots have lost intensity, ie, by the white spots lit again easily the stone. (Of course you can see the stains still) 3.) Will the action be repeated next year. Fight 4) fungal infection time