Getting Black Stains Out from Toilet Bowls

There is also liquid pumice ... available at janitorial supply shops. Works wonders and in under a few minutes with very little scrubbing.

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Drop Alka Seltzer in the toilet and let it sit for as long as possible, then scrub! Good luck!

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Try a pumice stone for toilet bowls - sold @ Smart & Final and other stores carrying industrial cleaning supplies.

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I'm not sure if it will work, but my dad SWEARS by vinegar. He says just dump some in and let it sit a day or so and then scrub with the toilet brush and it comes clean. We just moved into a new house so I havent tried it yet with my toilets, but it cant hurt.

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Yes, pumice stones work great! I used to be a maid and this is what we used. Worked every time! :)
(I think you can even find them at WalMart or whatever...)

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Try a pumice stone.

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Yep, just like everyone else has said, pumice stone. I buy mine in the cleaning supplies aisle at Albertsons.

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We use a pumice stone in our house and it works great. Just pull on some rubber gloves and scrub gently. It will take all those hardened brown calcifications right off! They can be found in the beauty aisle with the nail and hand care products.

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a small piece of window screen also works (I know, sounds weird). Rubber gloves, just use maybe a 1- or 2-inch square like a scrubbing sponge. Needs to be uncoated type of screen.

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You can also find the pumice stone at the 99 cent store.