Fantastic!

I’ve been using these in toilet cleaning tabs for well over 10 years. They last about 3 months depending on how often you flush the toilet. It has a bleach smell but not over powering. I only have to clean my toilet once a week and not daily like I use to. We have hard water and rust tends to accumulate quickly but not with these! Attach the in tank tablet holder drop in 2 tablets and sparkling clean for months!