My roommates and I are always up for a good experiment to keep us entertained. We bought one of those things you put into the back of the toilet that cleans it when it flushes. It was one of the 2000 Flushes kind, so we thought we'd conduct a little experiment...
Does a 2000 Flushes tablet really last for 2000 flushes?
So here's what we did...
Yup, we made a tally after each flush. It was always fun to see the reaction of guests when they would use our bathroom.
We gave up after a little over a month. I came home from Arizona and saw that the little tablet was pretty much gone and our toilet was getting gross (sorry, but it was).
Our conclusion: It does NOT last for 2000 flushes.
Maybe in a public restroom where it is used more than 4-6 times a day.