Product review (3 stars): ITS OK
IT DOES A GOOD JOB REMOVING IRON AND CALCIUM FROM THE WATER ESP IF YOU HAVE HARD WATER.  ONLY BAD THING IS THE PINK DYE STAINS YOUR TUB/GROUT DONT SPILL IT! AND YOU DONT NEED MUCH.  ADD IT AFTER OTHERWISE IT FOAMS UP WHEN ADDING WATER.