ZepAcidic Toilet Bowl Cleaner - 32 oz (Case of 4) - ZUATBC324 - Experience the Ultimate Cleaning Power with Our 2x Thicker Clinging Formula, Designed to Deliver a Professional-Quality Clean

I’ve had a very bad, dark mud colored hard water stain all over the inside of the toilet bowl for at least 30 years and no amount of scrubbing or other products such as using a pumice stone could remove it. I even asked a plumber who came to the house what could work to clean it and he said the best thing to do was to get a new toilet, or just live with it, as NOTHING would remove those bad stains that have been set for all these years, they were caked on the inside for good. I followed the advice of another buyer I read here in the reviews to double the amount of Zep I poured in and let that stand about 15 minutes before scrubbing. Three times I put it in the water; the fourth time I plunged most the water out of the bottom and though it took a whole lot of scrubbing with a toilet brush, I've gotten I would say 97% of that stain removed and the toilet bowl is bright and shiny and WHITE inside now! I’ve used a whole bottle and I plan to start again next week with another new bottle on that remaining 3% which is at the bottom hole and I think I will get all of it removed, just a little in that area is left to work on. I just wanted to say, and I hope all of this will let you know, Zep really REALLY works and I highly recommend it: if it got this what seemed totally hopeless toilet to look very clean it will work for you too! ♥

I’m a rental property cleaner, and we had this one toilet that was stubborn—like, it laughed in the face of every cleaning trick we threw at it! Bleach? Pfft. Every potion and scrub in the book? Nope. We were this close to tossing it out when someone whispered about this magical stuff. I was skeptical—c’mon, I’ve tried everything! But I followed the directions, added a little extra flair for good measure, and let it chill for 10-20 minutes. One swipe with the brush, and poof—those stains vanished like they owed me money! That toilet’s sparkling so bright inside, it’s practically winking at me now!

This stuff is amazing!!! I have tried almost everything, including Krazy Klean (who have a lot of satisfied customers)...but it really didn't work well for me...but Zep solved all my problems...my toilet bowl was dirty..the Las Vegas water certainly doesn't help either..it is now clean!!!

Nothing removes hard water build up like this stuff. I need to see if it's safe to use with my septic tank - but I almost don't care, it works so well. I barely have to use a brush, just squirt this under the rim before I go to bed at night, and I the morning the toilet is clean.

zep is a product that works for it,s intended use as a grip onto sides of bowl yes it does

Worked welk but not quite as advertized. Works eell enough to make it a good purchase.

Works great even on hard water ring we get here in the Phoenix area

This stuff is some kind of magical dragon fairy product! It got all of the rust and buildup yellow calcium stains along with soap scum off my shower immediately sold it on a TikTok decided to try it so I bought it in bulk. I highly recommend this product.