Worked like a charm
It works.  Had really hard deposit in master toilet calcium lime ring.  Brushing did not work.  Chemicals did not work.  Used this and came off.  Used in other toilets with less buildup and worked and now clean as can be.  Can be used in future did not need more than one.  Unfortunate did not take pics before and after.  But it did the job.  Used in sinks to get rid of the calcium buildup as well.
Rating: 5 stars