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topic 8229

Removing stains from bath tubs. Hydrogen Peroxide is the answer for rust stains!

A discussion started in 2001 & continuing through 2017


Q. I have stained my heavy old-fashioned bath tub by pouring sulphuric acid down the drain to remove a clog; the fumes have made dark brown stripes on the sides and bottom of the white enamel tub. Is it possible to remove these unsightly stains with ordinary javel water bleach? If not, what should I do short? Can anyone help me, please.

David Alexander Mitchell
- Montreal QC, Canada


A. An oxidation problem has occurred.

Let's de-oxidize ... buy Naval Jelly [linked by editor to product info at Amazon], A RUST REMOVER. Simply, a de-ox, and will remove those drip-rust-stains...... as well as the chemical stain that you incurred. Drawback; the porcelain may have impurities that were reacted upon by the staining acid. Regardless. Proceed by getting protective gloves [linked by editor to product info at Amazon] & goggles [linked by editor to product info at Amazon] on now. Use a 1" paint-brush and brush on the Naval Jelly until it is absurd. Leave room for 4 HOURS, with fan running. Return and DON ON the gear again. Rinse the jelly off completely. If another layer is required (doubtful), then let surface dry, or force-dry with a hair dryer. Apply coat #2 absurdly, leave again 4 hrs.

Paul T. Knisely
- Kenmore, Washington


A. Hi
I had terrible stains in my tub from a professional drain opener made with sulfuric acid. I used the Works (green bottle and I think that helped little) then I put on Lysol thick blue toilet cleaner and that worked great!
Also, I had the stains in my kitchen sink from the same drain opener product, and the toilet bowl cleaner [linked by editor to product info at Amazon] worked on those also. I got most of the stains out! You should try it. It may have scratched my tub a little and hurt the finish.. not sure, but the nasty horrible brown stain is gone and that is great. Good luck.
Try it on a small spot in your stained area and see if it works and if it is safe for your tub or sink

Colleen Mcgraw
- Grand Rapids, Michigan

July 30, 2010

A. Hey guys, for natural options, you can soak paper towel to white vinegar and let it stay to the stained areas for 2 to 3 hours :)

Cristina Yap
- Chicago, Illinois


A. I hope I can save someone 8 hours of torture. To remove those brown stains in the bathtub caused by sulfuric acid fumes, pour some hydrogen peroxide [linked by editor to product info at Amazon] on the area. The brown stains will disappear faster than they showed up!

Dennis Mostyn
- Lincolnwood, Illinois

March 23, 2008

thumbs up signSimilar to others above, I used a sulfuric acid drain declogger in my bathtub drain and the fumes stained the entire tub a dirty brown. Normal cleansers didn't touch the stain and I was really worried until I found this site. The hydrogen peroxide (simple drugstore antiseptic) sounded like the least caustic remedy so I tried it first, painting it on with a paintbrush. Presto, the stain disappeared with each brushstroke! Thanks, Dennis!

T Bruce Bridgeman
- Toledo, Ohio

July 21, 2008

thumbs up signLike others, I used a commercial drain cleaner with sulfuric acid on my older bathtub drain. The fumes stained the entire tub - bottom, sides, top rim - dark brown. I scheduled a company to reglaze it (for $350) and then thought to check online. I poured some hydrogen peroxide on the stains and they vanished! Thanks to the person who took the time to post this solution. You saved me a lot of money. This is a great site.

Janet Fisher
- Newton, Massachusetts

February 11, 2010

thumbs up signI too put sulfuric acid down a tub drain. I did this hours before guests arrived for the weekend. My tub stained horribly brown almost immediately from fumes even though no sulfuric acid had touched the porcelain tub. I saw this online hydrogen peroxide tip - I was skeptical, but I thought I couldn't possibly make it worse. I bought a bottle of hydrogen peroxide and wet paper towels with peroxide. I lined the tub with the paper towels. I left the paper towels there for an hour. While some stains came up immediately, the deeper stains needed the full hour. BUT IT WORKED! Long live Google!

S Hollinlike
- New Orleans, Louisiana

February 24, 2010

thumbs up signTHANKS A MILLION DENNIS! Hydrogen Peroxide worked like a charm!

Ken Virani
- Los Angeles, California

April 10, 2011

thumbs up signI just found this post and I was blown away with how well the Hydrogen Peroxide worked on the sulfuric acid stains. I just sprinkled it in the tub and like magic, the stains disappeared.

I checked it out about 5 minutes ago, and they are still gone. I will return with a better dose and a cleansing of the Peroxide, just to make sure. Thanks for a great solution.

Holly Free
- Hollywood, California, US

Brown bleach stains on tub


Q. Hi
I put neat bleach on my old enamel bath to clean it, but when I came back there was a horrible brown stain I can't get off. Can anyone help?

Mrs Jennines
- U.K.

May 22, 2008

A. I just sprayed basically, straight bleach on the mildewed tile grout in my tub surround and cane back a few minutes later to major rusty colored drips all over the sides of my tub. I tried the hydrogen peroxide idea (put some in a bowl and brushed it on with a paint brush) and the stains disappeared instantly! Thank goodness! My husband would've gone through the roof if he saw that! Thanks Dennis!

Erin Boone
- Houston, Texas

June 21, 2008

A. I had used bleach on the tub for stains also and ended up with brown stains - I used CLR [linked by editor to product info at Amazon] and they were gone in minutes.

Thanks for the help

Don Taylor
- Arl, Texas

February 16, 2009

thumbs up signWOW, this was so great and helpful.

Chris O
- Birmingham, Alabama

March 26, 2009

thumbs up signFreaky but it does work! Saved us $275 on re-glazing!

Carol Wolaver
- Msqt, Texas

May 27, 2009

thumbs up signThank you for the advice on how to remove tub stain . I'm very happy that the Hydrogen Peroxide work's very well and also very quick. Thank you very much
Jose from Chicago

Jose Lopez
- Chicago, Illinois

August 22, 2009

thumbs up signThe hydrogen peroxide was amazing. I bought a bottle for $1 and filled up a sprayer. The stains came off as quick as I sprayed. Thank you so much.

Cindy Wilkerson
- Longview, Texas

May 4, 2010

A. Oxidization from Bleach on your tub?

I did the peroxide remedy to my bleached tub. It worked like a CHARM!

I rubbed with a disposable handi-wipe. For the more stubborn part which was at the end closest to the drain, I just soaked the wipe and laid the peroxide on it for about ten minutes. Came back, and it was GONE! I mean before my tub was like brown and bronze from the oxidation. Now it's whiter than it was before. THANKS!


Yoy King
- Columbus, Georgia

September 16, 2010

thumbs up signDennis you are a life saver! I just moved into my new apartment and the tub had some stains from the previous owner. I tried to clean it by spraying down the whole tub with bleach, per my mothers instructions. It immediately made these ungodly brownish-red rust stains. I was mortified at the thought that this would stay, as I have a guest coming over shortly, furthermore I didn't want this to come out of my security deposit. I filled a spray bottle with hydrogen peroxide and let it sit. The stains started to whiten within a few minutes! The tougher stains may need a second coat but THIS DEFINITELY WORKS. I was reading about some other solutions on other websites like CLR but I had a bottle of hydrogen peroxide on hand so I thought I would try this first and I'm glad I did.

Dean L
- Boston, Massachusetts, USA

January 22, 2011

thumbs up signJust like to say, Dennis, you are a star! Top Bloke! You have saved me a lot of money and I thank you! Wot goes around comes around, my friend.....x

Deb Oily
- Lancaster, U.K.

October 30, 2011

thumbs up signThank you from the bottom of my heart for the Hydrogen Peroxide tip! It worked in seconds, as soon as I applied it with a sponge. AMAZING! My husband would have lectured me for the rest of my life about staining our bathtub. I am happy I know this and I will share it with my friends!

Raluca Topor
- Chicago, Illinois

March 31, 2012

thumbs up signI used the Hydrogen Peroxide and it knocked the bottom out of the rust stains in my tub! Thanks!

Brett "Old Sport" Svatek
- Los Angeles, California

April 15, 2012

! Open house to try to sell in less than 12 hours and I left bleach on my clawfoot tub, came back to find a nightmare of orange stains. Found a 24-hour pharmacy, loaded up on hydrogen peroxide; the stains were gone so quickly and easily that I wish I'd known it was that simple because then I wouldn't have tried scrubbing until my fingers throbbed before getting in the car. Thanks all!

Ann Smith
- Wichita, Kansas, USA

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Acid roughened tub and turned it white

July 29, 2010

Q. Hi, used sulphuric acid industrial strength to unblock my drain unfortunately it has stained my off white bath tub white. Will hydrogen peroxide work? Help please.

Aisha S
- london england

February 17, 2013

A. Hi Alisha.

Sorry, but if the coloration was bleached out by the acid, I don't think you can restore it with peroxide.


Ted Mooney, amadeya42.com Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

August 9, 2012

Q. A friend left a virgin sulfuric acid drain cleaner in my old claw foot tub overnight. I cleaned the discolorations, but I'm left with a very rough surface. I can't tell if it's a deposit on the enamel surface or if the sulfuric acid ate away the enamel. I've been able to kind of scrape some off with a knife (I think) but haven't found any way to make it smooth again. Has anyone else had this problem? Or know if I can fix it?

stephanie craig
- newton Massachusetts US

August 10, 2012

A. Hi Stephanie. It's possible that it can't be fixed -- that the sulfuric acid selectively etched the porcelain too severely. But you won't fix it chemically.

Assuming you don't have a buffing machine, get a buffing pad for your battery operated drill, put some polishing compound like Mother's Mag & Aluminum Polish [linked by editor to product info at Amazon], or even Barkeepers Friend [linked by editor to product info at Amazon] on it, and see if you can smooth out the "tooth". Good luck.


Ted Mooney, amadeya42.com
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

August 20, 2012

thumbs up signThank you! I will try that.

Stephanie Craig
- Newton Massachusetts US

Aluminum or steel scratch marks in tub

March 14, 2008

Q. Hello
I cleaned the steel oven rack in the porcelain bath tub. It left numerous "aluminum-looking" scrape marks on the tub, though obviously not aluminum. Tried VIM and Mr Clean to no avail. Help, please?

Robert Barr
hobbyist - Winnipeg, Manitoba

March 14, 2008

A. Some other readers reported scrape marks like that in their sinks caused by titanium rings, Robert. Some suggestions were made and some success reported on letters 18828 "Titanium scratch marks on porcelain" and 20906 "Titanium stain on porcelain sink". You might see if those ideas work for you. Good luck.

Ted Mooney, amadeya42.com
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

March 19, 2008

thumbs up signThanks for leading me to query . Glass Stove-top cleaner had the metal scrapes removed from the porcelain bath tub in two minutes flat. No damage.

Robert Barr
- Winnipeg, Manitoba

Bathmat-like pattern in tub

April 15, 2012

Q. I just had my dream house completed from the ground up. My guest bathtub is stained from the original installer of the tub. It has a stain as though there is bath mat down to keep you from slipping and falling when taking a shower or bath. I want to say I want to scream but afraid the neighbor would think I am a nut. This will not go away and I hate it.
Anyone out there with some advise before I have the entire tub replaced?

Betty Williams
- Fort Lauderdale Florida

April 15, 2012

A. Hi Betty; sorry for your problem. But it's hard to figure out what, if anything, will remove a stain of unknown origin and type.

Some tubs, however, including my new one, have a faint bathmat pattern built in, which is reasonably visible in some light; you might double check with the supplier if this might be the case because it sounds like it to me.


Ted Mooney, amadeya42.com
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

February 16, 2013

Q. Hi. My daughter has poured neat disinfectant onto an old bath at her rental causing brown stains; the active ingredient is benzylalkonium chloride. Will hydrogen peroxide take it off do you think?

Susan Kane
- Newcastle NSW Australia

June 30, 2013

Q. My acrylic/fiberglass (don't know which one) bathtub is next to a window (with the shade always closed). I had candles and flower candle rings around the top of the tub. I removed the candles/rings and those areas are white and the remainder of the tub has turned yellowish (not evenly). Would this situation be alleviated by the use of hydrogen peroxide to make my tub white again?

Linda Rhodes
- Murrieta, California, USA

July 16, 2013

I've still not seen a response to my question. Will Ted respond to it?

Linda Rhodes [returning]
- Murrieta, California, USA

July 16, 2013

A. Hi Linda. This is a public forum where we share camaraderie and post people's questions and answers. I have no experience in this area, so I only respond if nobody else replies, out of courtesy to you for posting here.

I claim no expertise in tubs, but my belief is that the top layer of resin or coating on the tub has yellowed with time and/or with this minimal exposure to sunlight. I strongly doubt that peroxide will accomplish anything ... Sorry to transmit bad news.


Ted Mooney, amadeya42.com
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

September 14, 2013

Q. HELP, I have used drops of essential oils in my acrylic bath when bathing my granddaughter, and I have just rinsed the bath with water to clean it. As it is our second bathroom it isn't used very often and I have just looked at it and the oils have dried in a yellow staining on the bath sides. Obviously as the water has drained, the oil has stuck to the surface; you can feel it is raised so isn't so much of staining but actual dried residue. Any ideas how to soften it to remove it any ideas welcome :)

Leigh Haupt
- Perth Western Australia

January 7, 2014

Q. I spilt iodine on what I believe is acrylic plastic? I made the mistake of trying to remove it with ammonia which set it rather than remove it ... Is there any way to remove it? Or is all lost .... :( ?

Many thanks,

Lindy Berg
- Bedford, Massachusetts

June 21, 2014

Q. Hi this looks really promising, better than spending £400 to have it re-enammeled. What strength hydrogen peroxide should I buy. Thanks

Jill B [last name deleted for privacy by Editor]

3% Hydrogen Peroxide
(case of 12)

June 2014

A. Hi Jill. I see no advantage in using an overly strong and unnecessarily dangerous concentration. I'd just go with the 3% drugstore strength. =>


Ted Mooney, amadeya42.com
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

July 1, 2014

Q. Since taking up residence here three years ago, I have been battling the rust (?) brown stains/film on both tubs and surrounds, but the same "blight" is in the commodes, inside the refrigerator by the lights, pieces and parts of almost every electrical outlet, lightbulbs (including fluorescents), sockets, with few exceptions, almost anything electrical. STRANGELY, where water sits in the back of the tank, no stain, but when I siphoned it out for cleaning, it started to stain as well. I will work on the stains for hours, swapping out product, going back to baking soda & peroxide, sometimes Glass Stove cleaner, sometimes it works if I don't RUB, when I rub it's like I'm sealing it back into the finishes; and sometimes, I'll just be wiping it down dejectedly and there's an incredibly clean spot under part of my labor. What the?? Now I'm trying again, with a paintbrush and patience. I just don't get the chemical reaction that's doing all of this damage...any thoughts? This is the first community I've discovered who doesn't think rust is rust and nothing else happens :(

Christine Hay
- Mandeville, Louisiana USA

July 16, 2014


L. johnson
- Muskegon Michigan

July 19, 2014

thumbs up signThanks for this helpful information. My kitchen sink was clogged and my husband used something that made our bathtub look stained. I tried several solutions, but the stains would not come off. Then I used Hydrogen Peroxide and the stains instantly disappeared.

Carla McClure
- Hickman, Kentucky USA

!! Dennis -- write a book already! We're waiting on more wisdom!

Tj Ones
- Fresco, Texas

September 20, 2014

thumbs up signI had ugly brown stains in my tub from removing mildew grout stains with bleach in a spray bottle. Just spray bleach on the mildew and within minutes the mildew dies leaving nice grout again. Unfortunately, the dead mildew dripped into the tub leaving ugly brown stains. Tried spraying on Hydrogen Peroxide and the brown stains simply disappeared -- incredible.

Charles Naftal
- Mineola, New York USA

November 21, 2014

thumbsdownSadly the hydrogen peroxide did not work for my drain opener stains. Don't know what to do...

Dani Lawson
- Tinton Falls, Virginia

December 2014

Hi. The peroxide answer was for porcelainized cast iron tubs, plus wherever else it may be useful.
It is possible that if your tub is fiberglass or acrylic, that the drain cleaner damaged it to where simply removing the rust won't restore its looks :-(


Ted Mooney, amadeya42.com
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

December 10, 2014

thumbs up signI used a clog remover containing sodium hypochlorite and sodium hydroxide in a drain in a porcelain on cast iron 100-year old sink and discovered brown stains around the drain area - I very likley was not careful and let the product splash out. The advice to try hydrogen peroxide is fabulous - it started removing the stains immediately and I soaked a paper towel in the hydrogen peroxide and let it sit on the stained area for just a few minutes and now the stains are gone. Thank you SO much for the chemistry lesson!

Ardath Weaver
- Raleigh, North Carolina, USA

December 19, 2014

Q. I have lived in our current house for 15 years. We have had the yellowish/brown stains in the old tub the whole time. I assumed it was the enamel wearing through. Now that I see what it is I had hope but none of the suggestions seem to be working for me.
All of the related stories indicate that they were able to fix a problem that they had caused ...soon after they caused it.
Has anyone been able to remove the chlorine tub stains after years and years?

Chuck baber
- Strasburg, Virginia-USA

December 20, 2014

A. Use Liquid Clorox 2 to remove the brown tub left behind from drain openers. It comes in the blue bottle. Make sure it is Clorox "2"
Works great. It's nice and thick, so it coats real nice. I promise this is the trick!

Beth Olson
- Tulsa Oklahoma USA

March 13, 2015

thumbs up signHallelujah to the people who posted about using simply peroxide on removing totally browned tub from using sulfuric acid in drain. I panicked when I saw enamel tub completely stained. Thank you thank you for this site and all of you folks sharing your experiences which saves time and much money. Just call me grateful.

Regina Williams
- jacksonville florida usa

March 23, 2015

Q. I had my tub professionally refinished 6 years ago. The contractor used an acrylic epoxy applied with a sprayer. I have minor red rust hard water stains beginning to show and would like to stay on top of them before they get bad. I was going to try to use the peroxide but I am not sure if this will harm the painted surface. The contractor told me to only clean it with scrubbing bubbles but I think he just wanted to cover his butt. Normally I would use the works, but I am concerned that might damage the surface. Can anyone shed light on what to use without hurting the painted surface?

Jenny Tully
- Cleveland, Ohio USA

June 3, 2015

thumbs up signThe hydrogen peroxide worked like a charm on my bath tub. Thanks a million.

Linda Wright
- Chicago Illinois USA

September 20, 2015

thumbs up signThe hydrogen peroxide worked immediately. I will take the Clorox 2 back since H.P. is cheaper. Thank you sooooooooo much. I am so relieved.

Pat Reese
- Quantico, Virginia

October 3, 2015

thumbs up signThis is amazing! been battling stains on an enamel tub will try the hydrogen peroxide. Pool acid was used once but the stains came back! I am so happy to have found this conversation, surely saved me a light year of scrubbing!

Belle Bends
- Harare Zimbabwe

February 5, 2016

thumbs up signMy tub turned brown from a mixture of cleaning products. After reading some of the suggestions I tried the Hydrogen Peroxide and the brown streaks disappeared. Thanks so much for the helpful advice.

Gloria Harp

March 5, 2016

thumbs up signI used the Clorox cleanser on my porcelain tub. I left it for too long and the cleanser left lines of stains all over the tub. So frustrated 'cause I got no time to figure this out ... the HP works wonders, they are all gone; so glad I found this site instead of trying all kinds of methods.

Star Ferry
- houston Texas

April 17, 2016

thumbs up signUsed peroxide on my tub to remove acid stains, WOW! I put paper towels in the tub and soaked them with peroxide. I left it on overnight and the stains were gone!

Chris Novak
- Euclid Ohio

September 29, 2016

!! Magic! Pure and simple magic! I needed a product to get the brown stains out of my porcelain tub after using drain cleaner. Hydrogen Peroxide worked like magic! We used just one little bottle that costs less than $2 and life is good again. Thanks to everyone who posted about the virtues of HP.

Adele Prince
- Thomasville, North Carolina USA

November 18, 2016

thumbs up signMarvelous...It works so fast and so easy: Thank You

Joan Leong
- San Francisco, California USA

February 4, 2017

thumbs up signThanks for the solution of hydrogen peroxide! I was starting to worry after trying to scrub the tub and nothing worked. Thanks for the information!

Amy Morrison
- Charlotte North Carolina

July 26, 2017

Q. Hi, used sulphuric acid industrial strength to unblock my drain unfortunately it has stained my off white bath tub white.

Is there anything that will work to get these white stains back to the baths original off white colour?

Mark kravetz
- London, England

July 2017

Hi Mark. Your tub could be fiberglass, acrylic, enameled steel, porcelain, or maybe another material. I don't think anyone could do more than guess even if they knew what your tub was made of. Letting peroxide sit on it for a couple of hours, then scrubbing with something like Barkeeper's Friend is about all you can try; and still, while it might be "white stains", unfortunately it might also be that the acid bleached the color away permanently.


pic of Ted Mooney
Ted Mooney, P.E. RET
Pine Beach, New Jersey
Striving to live "Aloha"

July 26, 2017

Q. Thank you for your response. I was using one shot to unblock the drainage hole, but unfortunately spilt it in the bath. My bath is a plastic type material. Would the method you suggested be suitable for the material of my bath or have you got another suggestion for this material to get the colour back to its original off white colour?

Mark kravetz [returning]
- London, England

August 2017

A. Hi again. Acrylic is not resistant to concentrated sulphuric acid, so I suspect that the color has been bleached away. You could try a rubbing compound on a buffing pad in a battery powered drill, but I don't know whether it will help or not.


pic of Ted Mooney
Ted Mooney, P.E. RET
Pine Beach, New Jersey
Striving to live "Aloha"


October 15, 2017

Q. I poured this orange liquid called biodrain down my tub. Now my tub is stained orange. I've tried everything to clean it. Any suggestions on what I can try to remove it?

Adina Steinberg
- Inwood New York USA

October 2017

thumbs up sign Hi Adina. Sadly, two reviewers on Amazon reported the same problem :-(

Please tell us what your tub is made of (to the extent that you know). I'm sure "I've tried everything" was merely rhetorical; but tell what you've actually tried so people can suggest something else -- a reader would look pretty foolish to suggest something, only to have you say "Of course I tried that! Didn't I just finish telling you I tried everything." :-)

A pic would help ... presumably it's not the whole tub but a small ring around the drain? Thanks ... and good luck.


pic of Ted Mooney
Ted Mooney, P.E. RET
Pine Beach, New Jersey
Striving to live "Aloha"

November 30, 2017

! :-) Just want to chime in with all the other responders who used hydrogen peroxide to clean the brown stains left in their tub after using an acid based drain cleaner. Wow!! It was amazing! Took a paint brush suggested by someone else and simply wiped away the stains. No effort at all. So glad I found this site. We were ready to have the tub resurfaced which would have cost us a ton more than a bottle of hydrogen peroxide. Nothing else we had tried had worked. So thank you, thank you, thank you.

Rose Bowden
- Azle, Texas USA

Cast Iron Tub Smells and Stains for No Traceable Reason

December 19, 2017

Q. Hello, I have a mystery. We had 2 old claw foot tubs and I used the upstairs tub every day for 10 years, cleaned it faithfully and gently. One day I smelled an odor like rotting onions around the tub. The smell rapidly worsened and with it came a brown stain. The stain deepened to the high water point of the tub and the stink worsened.

I tried various cleaners on the stain, dumped massive quantities of baking soda and gallons of vinegar down the drain. All other plumbing in the house was fine. 3 plumbers later nobody knew what was going on. I could scrub the stains away with Ajax, but they came back with the smell within 24 hours. If I thoroughly dried the tub it still came back. Finally we had the tub removed, wrote it off to some unexplained fluke, figured maybe something broke down the enamel and reacted with the steel?

While awaiting the fix; and then the new, acrylic replacement tub, I used the other tub in the house in the guest bath. I have been using it daily now for a month, and the odor has begun in that drain! I have used nothing stronger than Dawn dish detergent and Bon Ami to clean it. Why is this happening to the second tub and only after I started to use it? I have asked myself what changed, and here is one thing that changed a few months ago. We started a low-carb diet a la Dr. Perlmutter's Grain Brain recommendations and I jumped on board with the supplements too. I have been looking up obscure side effects of things like alpha lipoec acid, wondering if my body soaking in that tub is causing some reaction now that I am taking the supplements?

I am reading lots of posts about sulphuric acid down the drain doing damage, how about a person taking alpha lipoec acid and soaking in the tub. I have stopped taking the supplements and I am now dousing the drain with hydrogen peroxide. I really hope it works. Wendy

wendy t [last name deleted for privacy by Editor]
- Potsdam, New York, USA

January 13, 2018

A. I had stained my heavy old-fashioned bath tub by pouring sulphuric acid down the drain to remove a clog; the fumes made dark brown stripes on the sides and bottom of the white enamel tub. I was searching on the internet for the solution and on one forum I stumbled upon the answer where this guy was talking about 100% oxalic acid stain remover, so I tried it, and it works perfectly, I managed to remove all the stains. Cheers!

Jessie Connor
- Sydney, NSW, Australia

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