These things are not good for toilets they create a slow flush. I spent 3 days trying to figure out why the toilet was not flushing properly. Finally I reached in and grabbed a mushy blue goo that felt like grease. What it does is mixes with the water making it too thick to transfer from tank to bowl at a fast enough speed. Look up blue goo and read stories about it. How can something that causes problems be on the market? How many people don't find this out and replace a toilet for no reason? They should at least warn people that using these thing can make the toilet not work properly. They finally told us that smoking is not good for us do we have to wait till they tell us about bad products?
Recommend this product?