Beer Stones?

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Ajae

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I’ve had this no name stainless steel conical fermenter for a while now (pretty sure it the original Morebeer one). I got it from the culinarily school I used to go to, when they had a fermentation class. Anyway I made some hard cider a while back when wife was pregnant with our first kid. Problem is I completely forgot that I made it and it was sitting in fermenter a long time year plus I’d say. So I dumped it and noticed these marks in the fermenter. I tried scrubbing with soft pad hot water and PBW. I then did a citric acid bath for 30ish mins drain and let air dry. The marks are still there. Should I try buffing these out and then try to passivate again?
 

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I’ve had this no name stainless steel conical fermenter for a while now (pretty sure it the original Morebeer one). I got it from the culinarily school I used to go to, when they had a fermentation class. Anyway I made some hard cider a while back when wife was pregnant with our first kid. Problem is I completely forgot that I made it and it was sitting in fermenter a long time year plus I’d say. So I dumped it and noticed these marks in the fermenter. I tried scrubbing with soft pad hot water and PBW. I then did a citric acid bath for 30ish mins drain and let air dry. The marks are still there. Should I try buffing these out and then try to passivate again?
What is your concern?
 
Speaking from my perspective, it's a fermentation vessel, and I never want to see deposits in a fermentor as they can prevent effective sanitation.

If it was a boil kettle I would still clean that up bright - but in that case it'd be my cleaning compulsion kicking in ;)

Cheers!
 
If it's actual beer stone you need to use an acid based product. Star San to the rescue! 1oz of Star San to 1 gal of water. Soak overnight and it'll wipe right off. No scrubbing necessary.
 
fwiw, I've see that recommendation often but Star San has literally never ever worked to clean actual beer stone off anything for me. Otoh, the oxalic acid in BKF along with its mild abrasive works every time...

Cheers!
 
fwiw, I've see that recommendation often but Star San has literally never ever worked to clean actual beer stone off anything for me. Otoh, the oxalic acid in BKF along with its mild abrasive works every time...

Cheers!
I've had the complete opposite experience. I had excessive beer stone on SS cooling coils and tried like heck to clean them with PBW/BKF. No go. A 1ozStar San/1gal water overnight soak was all that was needed.
 
I’ll be giving the first recommendation a shot today then moving down the line. Thanks gents.
 
+1 for 4x strength StarSan for beer stone. It actually works better than the beer stone remover from Five Star. I use it in kegs. I built a keg spinner that tumbles 1/4 gallon of water mixed with 6ml of StarSan. The motor is hooked up to a timer that runs for 1 minute then pauses for 10 minutes. I let that run for 5 hours, then do a light scrub with a long brush. It comes right off.

~HopSing.
 
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