This is only my second summer with my trailer and it was by far the hottest... I didn't have any issues last year BUT due to the temperatures this year I was getting a lot more smell from the black tank through the toilet.... I tried multiple products and nothing worked. This was recommended and even though it's quite a bit more than the others I figured it was worth a shot...
I put some of this in and it was instantly gone... Like no smell at all. Truly fantastic stuff. In reading any of the bad reviews posted you'll find that almost all of them are user error, people who do not have the ability to read BASIC instructions... THAT IS IMPORTANT... Don't be foolish and then blame the product