THE BEST
I used 2 very popular brands, which were expensive, but they did not work.  I had an inch of  water in my bath that would not go down.  A few days ago I got Professor Amos Super Fast 2 Pack.  I put it an and didn't think it would work.  That evening I went up and the water was gone.  It works and was the only thing that did.  I will never go without a pack in my home.  It works great.
Rating: 5 stars