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General Category => Equipment and Software => Topic started by: brewthru on November 14, 2021, 10:15:58 am

Title: How to remove beer stone in corny keg?
Post by: brewthru on November 14, 2021, 10:15:58 am
I clean my kegs after every use. This includes the posts, tubes, poppets, etc.

First time I've noticed beer stone in 2 of the kegs.

I tried removing the beer stone using 2 tsp PBW in 1/3 keg of hot water. I shook the keg hoping to move around the PBW.

Unfortunately, kegs still have the beer stone at the bottom and on the sides.

Any ideas/recommendations for removing beer stone in corny kegs?
Title: Re: How to remove beer stone in corny keg?
Post by: narvin on November 14, 2021, 10:35:26 am
https://www.amazon.com/Five-Star-Beer-Stone-Remover/dp/B01MG0ROHK/ref=asc_df_B01MG0ROHK/
Title: Re: How to remove beer stone in corny keg?
Post by: ynotbrusum on November 14, 2021, 11:08:37 am
Pretty cheap and easy:

https://www.walmart.com/ip/Gal-Milkstone-Remover-Pack-of-4/39088460?wmlspartner=wlpa&selectedSellerId=7452&adid=22222222222000000000&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=10352200394&wl4=pla-1103028060075&wl5=&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=39088460_10000007565&wl14=dairy%20milkstone%20remover&veh=sem&msclkid=90704c33977012fd12a32da2d896f00e&gclid=90704c33977012fd12a32da2d896f00e&gclsrc=3p.ds

I soak the keg in a half keg solution for a few days, invert the keg and repeat.  Beerstone comes gf easily.

PBW alone rarely works, since it isn’t acidic.
Title: Re: How to remove beer stone in corny keg?
Post by: BrewBama on November 14, 2021, 11:43:48 am
Pretty cheap and easy:

https://www.walmart.com/ip/Gal-Milkstone-Remover-Pack-of-4/39088460?wmlspartner=wlpa&selectedSellerId=7452&adid=22222222222000000000&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=10352200394&wl4=pla-1103028060075&wl5=&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=39088460_10000007565&wl14=dairy%20milkstone%20remover&veh=sem&msclkid=90704c33977012fd12a32da2d896f00e&gclid=90704c33977012fd12a32da2d896f00e&gclsrc=3p.ds

I soak the keg in a half keg solution for a few days, invert the keg and repeat.  Beerstone comes gf easily.

PBW alone rarely works, since it isn’t acidic.
+1 …but you can get it a lot cheaper than Wally World: https://www.truevalue.com/sterosol-milkstone-remover-acid-rinse-1-gal



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Title: Re: How to remove beer stone in corny keg?
Post by: ynotbrusum on November 14, 2021, 02:36:08 pm
Pretty cheap and easy:

https://www.walmart.com/ip/Gal-Milkstone-Remover-Pack-of-4/39088460?wmlspartner=wlpa&selectedSellerId=7452&adid=22222222222000000000&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=10352200394&wl4=pla-1103028060075&wl5=&wl6=&wl7=&wl10=Walmart&wl11=Online&wl12=39088460_10000007565&wl14=dairy%20milkstone%20remover&veh=sem&msclkid=90704c33977012fd12a32da2d896f00e&gclid=90704c33977012fd12a32da2d896f00e&gclsrc=3p.ds

I soak the keg in a half keg solution for a few days, invert the keg and repeat.  Beerstone comes gf easily.

PBW alone rarely works, since it isn’t acidic.
+1 …but you can get it a lot cheaper than Wally World: https://www.truevalue.com/sterosol-milkstone-remover-acid-rinse-1-gal


Good point I got my last gallon for about $12 - i didn’t even look at the prices the Waltons prior to posting- Fleet Farm was cheap and readily available at near 1/4 tithe price.


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Title: Re: How to remove beer stone in corny keg?
Post by: scrap iron on November 15, 2021, 05:27:28 am
If you have star-san sanitizer on hand just mix up a double strength batch and soak them in that. I use this on my SS fermenter bucket too.  Beer stone needs acid to remove.
Title: Re: How to remove beer stone in corny keg?
Post by: hopfenundmalz on November 15, 2021, 07:12:55 am
If you have star-san sanitizer on hand just mix up a double strength batch and soak them in that. I use this on my SS fermenter bucket too.  Beer stone needs acid to remove.
Correct.

PBW is a base, so that is why it didn’t  work.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 15, 2021, 06:01:52 pm
Thanks for the input. I stopped at Ace Hardware this afternoon. Item wasn't in store. They were not able to order as delivery status was "ETA (blank)". Person working at Ace Hardware said this indicates "unknown" when available. Also, I would have had to order 4 bottles.

Ended up ordering from Walmart.
Title: Re: How to remove beer stone in corny keg?
Post by: goose on November 16, 2021, 08:39:16 am
Another way to remove it that is cheaper than Star San is to get an acid cleaner that is used for dairy equipment from a farm supply store.  The one near my house that sells and services bulk milk tanks has a product that contains Nitric, Sulfuric, and Phosphoric acids.  I use about 15 ml of the stuff in 5 gallons and soak for about 15-20 minutes.  It cleans up my boil kettle and kegs quite nicely.  If you are sticking with Star San you will need about one ounce per gallon of water (this is what SS Brewtech recommended for their conical fermenters).

Remember though, you have to clean the keg with PBW, Craftmeister, or caustic before doing the acid soak to remove any organic soils.  The acid won't remove these, only the inorganic beer stone.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 16, 2021, 11:01:20 am
Well, that didn't work! A WARNING TO OTHERS!

I ordered the 4 1 gallon jugs of milkstone remover for $58.00 plus tax from Walmart.
https://www.walmart.com/ip/Gal-Milkstone-Remover-Pack-of-4/39088460

Didn't seem unreasonable at $14.50 per gallon. Yes, ACE has the better prices at $12.99 a gallon, but I was unable to find.

Then, on Tuesday, November 16, 2021 I receive an email from Magellan Distribution Corp telling me the website is wrong and I will only receive 1 bottle and NOT the 4 bottles for $58.00 that I ordered. THIS IS ILLEGAL and dishonest.

I immediately contact Walmart to let them know, once again, this is illegal and dishonest.

Order canceled, but now I'm looking again to find the milkstone remover.

BTW, I tried BLC in the corny kegs. Didn't remove the beerstone.

Title: Re: How to remove beer stone in corny keg?
Post by: narvin on November 16, 2021, 05:48:19 pm
This isn't sold by Walmart directly, but through their third party marketplace.  I guess they're trying to compete with Amazon.

Anyone can report incorrect product information on that page.  So I did.
Title: Re: How to remove beer stone in corny keg?
Post by: EnkAMania on November 17, 2021, 03:52:29 pm
I remember a poster who got a good price on milkstone remover via a farm supply store.
Title: Re: How to remove beer stone in corny keg?
Post by: BrewBama on November 17, 2021, 05:36:22 pm
I remember a poster who got a good price on milkstone remover via a farm supply store.
I got mine for $12 at Tractor Supply.


Bier bewusst genießen

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Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 18, 2021, 10:41:06 am
Happen to have the Tractor Supply part number or url? I'm not finding when I check online.

I called my local TSC Store. They don't carry milk stone remover.
Title: Re: How to remove beer stone in corny keg?
Post by: BrewBama on November 18, 2021, 12:28:58 pm
I tried looking it up on their website and get no results . I had to order it and pick it up at the local store. Not sure why they don’t list it anymore.



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Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 19, 2021, 06:06:50 pm
Realized I have some B-Brite. B-Brite is supposed to clean beerstone. I'm hoping it will work as advertised to clean the beerstone from my corny kegs.
Title: Re: How to remove beer stone in corny keg?
Post by: narcout on November 20, 2021, 09:07:30 am
I think Bar Keepers Friend works, and it's generally available in large grocery stores.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 20, 2021, 12:33:57 pm
If I was able to reach the bottom of the corny keg I'd give Bar Keeper's Friend a try. However, hand/arm will not go into keg far enough.

I didn't have much B-Brite (in the white/orange container) so I ordered some B-Brite from Northern Brewer as I had a 15% off code.
Title: Re: How to remove beer stone in corny keg?
Post by: ynotbrusum on November 21, 2021, 08:04:17 am
I bought a long handled brush for this very purpose.  It has become my favorite brush to use, even when a long handle is not needed.
Title: Re: How to remove beer stone in corny keg?
Post by: goose on November 21, 2021, 08:56:43 am
I think Bar Keepers Friend works, and it's generally available in large grocery stores.

The only thing about Barkeepers Friend is that it is a bit abrasive.  I don't use it in kegs or my fermenters because to the possibility of scratching the stainless steel.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 22, 2021, 09:17:28 am
I see Star San contains phosphoric acid. I wonder if Star San is able to remove beer stone?

In the same idea, I wonder if a soda will remove beer stone since colas contain phosphoric acid.
Title: Re: How to remove beer stone in corny keg?
Post by: Richard on November 22, 2021, 09:34:56 am
I see Star San contains phosphoric acid. I wonder if Star San is able to remove beer stone?

In the same idea, I wonder if a soda will remove beer stone since colas contain phosphoric acid.

Yes, as Goose mentioned above. You need to make it extra strong, though, 1 oz/gallon. It may be more expensive than milkstone remover when measured by the gallon, but I can get StarSan from 3 miles away, while the nearest farm supply store is at least an hour's drive. That makes StarSan cheaper to me overall. I tried it last week and it did a great job.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 22, 2021, 01:49:08 pm
I missed the reply about Star San. OK. Thanks. Definately, one for me to keep in mind.
Title: Re: How to remove beer stone in corny keg?
Post by: Saccharomyces on November 26, 2021, 10:25:38 am
Any solution with a pH of 3.0 or lower will dissolve beer stone.  Beer stone is calcium oxalate (the same compound as a kidney stone).  The pH of double-strength Star San will get one there, but there are cheaper ways to dissolve beer stone.  The pH of straight white vinegar is 2.5.  A gallon is less than $3.00.  Like, Star San, it can be sprayed onto a surface.  The downside is the aroma.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 26, 2021, 12:53:54 pm
Perhaps, a good wash with PBW after using white vinegar?

I know white vinegar mixed with baking soda creates a bubbling cleaner.

Are these (white vinegar and baking soda) OK for use with stainless?
Title: Re: How to remove beer stone in corny keg?
Post by: hopfenundmalz on November 29, 2021, 02:01:38 pm
Any solution with a pH of 3.0 or lower will dissolve beer stone.  Beer stone is calcium oxalate (the same compound as a kidney stone).  The pH of double-strength Star San will get one there, but there are cheaper ways to dissolve beer stone.  The pH of straight white vinegar is 2.5.  A gallon is less than $3.00.  Like, Star San, it can be sprayed onto a surface.  The downside is the aroma.

Judged with John Blochmann a few times. Asked about his recommendation for removing beer stone. He said white vinegar was his go to.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 30, 2021, 02:20:32 am
Recommended mix of white vinegar to water to remove beer stone?

And then second question, how to remove the vinegar smell from the corny keg?
Title: Re: How to remove beer stone in corny keg?
Post by: hopfenundmalz on November 30, 2021, 01:03:24 pm
Recommended mix of white vinegar to water to remove beer stone?

And then second question, how to remove the vinegar smell from the corny keg?

You could dilute the benefit, with low alkalinity water (not my tap water, for example). The vinegar is pretty cheap. You could also spritz it around with a spray bottle.
Title: Re: How to remove beer stone in corny keg?
Post by: narvin on November 30, 2021, 02:38:16 pm
Recommended mix of white vinegar to water to remove beer stone?

And then second question, how to remove the vinegar smell from the corny keg?

I've descaled plenty of coffee machines with vinegar and hot water is enough to make the smell go away.  It doesn't seem to linger.
Title: Re: How to remove beer stone in corny keg?
Post by: brewthru on November 30, 2021, 03:54:22 pm
Thanks for all the great ideas!
Title: Re: How to remove beer stone in corny keg?
Post by: CFRAZIER77 on February 06, 2022, 05:31:37 am
Also you can use 5 Star acid #5.  It sells by the gallon.   You can ask your home brew shop to add it to their next order for you.   It, milk stone remover, and other simular strength acids require haz mat shipping fees.