VacplusToilet Bowl Cleaner Tablets 12 PACK, Automatic Toilet Bowl Cleaners with Bleach for Deodorizing and Descaling, Bathroom Cleaner Against Tough StainsCompact by Design (Amazon-developed Certification)

These worked when nothing else would! I tried at least a dozen other cleaners including CLR, and chlorine and acid based cleaners. For some reason, there was always a slight dark ring left behind even after scrubbing each day until my arm was tired for a week solid. I have no idea what caused the ring as I regularly clean. I thought maybe the porcelain was scratched! A couple of days with one of these in the tank and that ring finally was gone. I was so relieved to finally find something that worked! I can tell when I need a new one when the toilet begins to get a little dirty. I just easily and quickly clean it with any one of the many cleaners I have stockpiled and drop in another one of these into the tank and I'm good to go. I am absolutely thrilled to have finally won the battle, and will be putting these on subscription delivery. Thank you!

These work very well to clean the inside of the bowl without much extra help. I only wish they lasted a little bit longer. I believe I have to replace them almost weekly to stay up on it. Works well, but only last about one or two weeks if the toilet is used regularly. It depends on how much your toilet is flushed.

Good strong clean smell but doesn’t seem to help keeping the bowl clean.

I am suprised and pleased that this product keeps the bowl much whiter. Be sure to have the lid of the bowl off and open the celophane package away from your face and let it drop in the bowl. It is powerful as it must be to keep a toilet clean and white and you don't want a sniff

I recently tried using chlorine tabs in my toilet tanks, expecting a quick and easy solution to brighten stains, but I ended up with significant issues. Upon opening the package, I noticed that these tabs emitted strong chlorine vapors, very similar to the fumes from pool chlorine tablets. While they did help to clean and brighten the stains inside the toilet bowls, I quickly realized that the product’s effects went beyond what I had anticipated.The real problem began after using these tabs for a few weeks. I started to notice a greenish layer forming on the metal parts inside the toilet water tanks. This corrosion spread to components like levers, handles, and other metal fixtures. It looked similar to the green patina that develops on copper over time. At this point, I recognized the issue as chlorine corrosion. As a pool owner, I’ve experienced firsthand how chlorine can corrode metal, especially when stored in a confined space. This is why I always keep my pool tabs in an open area, so they don’t corrode nearby metal objects.Unfortunately, the chlorine in these toilet tabs had the same effect. Within a month of using them, I was forced to clean off the corrosion and replace several parts in my toilet tanks. The damage wasn’t just cosmetic—it led to extra costs and time spent repairing the toilets.I would caution anyone considering using these chlorine tabs in their toilet tanks. While they may help with cleaning, they pose a significant risk to the longevity of your toilet’s internal components. The corrosive effects of chlorine on metal are real, and in a confined space like a toilet tank, the damage can happen faster than you might expect. Buyer beware—if you value your toilet’s parts, I would strongly advise against using these products.

So far they are great! One of my clients recommended them to me that had well water with mineral deposits. Smells good too...not overwhelming, just a hint of a sweet smell in the bathroom, as well.

This product works great. You don't know it's working until it time to add another. It makes a big difference. Keeps the bowl nice and clean.

It keeps the back of the toilet clean and smells better after each flush. I have been using them for a year now.