[Joel5000]

So where can I get some of this magic powder?  Wasn't there some place overseas that would ship to the USA?

Also probably a silly question but the comment about spent grain turning pink made me wonder: will it still be safe to feed the spent grain to my chickens?   

Down under at https://www.ibrew.com.au/products/brewtan-b.  As for chicken feed, research food grade hydrolysable tannic acid.

Thank you!  Order placed and concerns alleviated.

[erockrph]

People using municipal source water and copper components are going to immediately see and taste a difference for sure. The impact of Brewtan B alone is going to decrease the farther away from those variables you get.

Any idea whether BTB is beneficial for iron and manganese as well? I would assume if it chelates copper, then it should handle most heavy metal ions, but chelating agents can be wierd about that sometimes.

[denny]

So where can I get some of this magic powder?  Wasn't there some place overseas that would ship to the USA?

Also probably a silly question but the comment about spent grain turning pink made me wonder: will it still be safe to feed the spent grain to my chickens?   

I feed it to my chickens no problem.

The pink hue has been reported by a few people out of the dozens I know who have tried it.  I've used it for maybe 15 batches now and it happened once.

[denny]

People using municipal source water and copper components are going to immediately see and taste a difference for sure. The impact of Brewtan B alone is going to decrease the farther away from those variables you get.

Any idea whether BTB is beneficial for iron and manganese as well? I would assume if it chelates copper, then it should handle most heavy metal ions, but chelating agents can be wierd about that sometimes.

I would recommend an email to Joe Formanek.  He probably knows better than anyone here.

[MaltMaker]

Why not just use tannin powder?  What additional chemicals does this contain?

http://bsghandcraft.com/index.php/chemicals-parent/additives/tannin-powder-1lb.html

[denny]

Why not just use tannin powder?  What additional chemicals does this contain?

http://bsghandcraft.com/index.php/chemicals-parent/additives/tannin-powder-1lb.html

Don't believe it's the same thing is it?

[MaltMaker]

Both are gallotannins, I guess the question is are both (HMW) high molecular weight gallotannins (as opposed to LMW, low molecular weight)?  And of course what else, if anything, is in the Brewtan-B.

Haven't tested this myself but I'd think they'd both be derived from similar food-grade tannic materials.

[denny]

Both are gallotannins, I guess the question is are both (HMW) high molecular weight gallotannins (as opposed to LMW, low molecular weight)?  And of course what else, if anything, is in the Brewtan-B.

Haven't tested this myself but I'd think they'd both be derived from similar food-grade tannic materials.

Personally, I'd rather be certain.  Remember, Ajinomoto makes 3 different Brewtan products, so not all gallotanins are created equal.  If I was to guess, I'd say that stuff is for winemaking.

[MaltMaker]

Personally, I'd rather be certain.  Remember, Ajinomoto makes 3 different Brewtan products, so not all gallotanins are created equal.  If I was to guess, I'd say that stuff is for winemaking.

Agreed, but what's the difference?  Has anyone ever tested "wine tannins" in a beer mash?

[denny]

Personally, I'd rather be certain.  Remember, Ajinomoto makes 3 different Brewtan products, so not all gallotanins are created equal.  If I was to guess, I'd say that stuff is for winemaking.

Agreed, but what's the difference?  Has anyone ever tested "wine tannins" in a beer mash?

What's the difference is exactly the question.  I don't want to assume they're the same.  If someone else wants to, that's their decision.

[bayareabrewer]

Why not just use tannin powder?  What additional chemicals does this contain?

http://bsghandcraft.com/index.php/chemicals-parent/additives/tannin-powder-1lb.html

tannic compounds are used in wine making, and their makeup can vary substantially. I would be wary of putting that stuff in my beer without knowing exactly what it was.

[MaltMaker]

tannic compounds are used in wine making, and their makeup can vary substantially. I would be wary of putting that stuff in my beer without knowing exactly what it was.

I wouldn't be afraid to try it, just not sure how you'd test for residuals in the final product.  Food grade tannin is food grade tannin, worst case you'd probably get a mouth full of astrigency.

[Big Monk]

Brewtan-B, Antioxin SBT, etc. are all likely using the same gallotannins.


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[bayareabrewer]

tannic compounds are used in wine making, and their makeup can vary substantially. I would be wary of putting that stuff in my beer without knowing exactly what it was.

I wouldn't be afraid to try it, just not sure how you'd test for residuals in the final product.  Food grade tannin is food grade tannin, worst case you'd probably get a mouth full of astrigency.

personal experience I've seen some pretty harsh tasting oak compounds and other things added to wine tannins that would probably taste pretty nasty in beer.

[denny]

tannic compounds are used in wine making, and their makeup can vary substantially. I would be wary of putting that stuff in my beer without knowing exactly what it was.

I wouldn't be afraid to try it, just not sure how you'd test for residuals in the final product.  Food grade tannin is food grade tannin, worst case you'd probably get a mouth full of astrigency.

personal experience I've seen some pretty harsh tasting oak compounds and other things added to wine tannins that would probably taste pretty nasty in beer.

Yep.  I won't try to talk anybody out of trying it, but I'm not gonna!  For whatever it might be worth, the tannin pictured in that link looked considerably darker than Brewtan.  But who knows how accurate that is.