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Calling Sherlock Holmes of Beer for funky finishing flavor

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ChrisCBC

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I am a new home brewer who has brewed about 5 partial mash batches with very good results and got itchy to make things overly complicated. So purchased a large kettle, burner and built a MLT from a 10 gallon drink cooler and a stainless steel hot water tank supply line. Very simple AG setup.

The AG beers I have made, Hefeweizen, cream ale, a few pale ales and an amber ale have tasted good but they all seem to have a strange aftertaste.

Well the first one, all grain batch, was nasty but I know what was wrong with that one. Over extracted my grains and made watered down yuk. I added a bunch of sugar water to it and a vinegar starter and now I have a lifetime supply of malt vinegar for my fries and chips.

I thought the flavor was coming from my wort chiller. I used an ice bath for this last test batch. After making a mini 2 gallon version using scaled down equipment, same valves and tubing but a smaller pot and cooler that I sacrificed for science and beer. Or maybe it should be Beer and science. The strange after taste is still there.

I have tried different base malts, marris otter, domestic 2 row and domestic 6 row all with the same result. I even had the LHBS crack my grains a few times thinking I was getting husks in my beer. I use a corona mill at home, barley crushers be expensive.

I notice the flavor prior to bottling/kegging and it doesn't seem to clear up like other funkiness tends to.

The offending finish occurred both using glass and pet 23l carboys as well as the bucket style fermenter my starter kit came with. All batches of all grain brew were placed in a large water bath in a huge fishing style cooler to which frozen 16 oz. water bottles were added to maintain fermentation temps between 57 and 63 deg. A digital thermometer with an alarm set to 65f. never sounded. I butchered a phone charger to be able to plug it into the wall.

Something I may be doing wrong, but am not sure. There seems to be lots of white funny looking stuff floating in my wort after chilling and racking into the fermenter. Should I let that settle out and leave it behind? I am fairly sure its coagulated protein from the grains and was told it is good for the yeast. It settles out after the primary fermentation is completed. The beers have been nice and clear.

Hop particles are contained, mostly, by muslin bags.

The flavor is very difficult for me to explain and my wife thinks I am nuts. Hell I am starting to think I am nuts. It isn't a coppery taste I just put a star san soaked penny in my mouth for a few minutes to verify. Its almost like an asprin taste but not nearly as strong. The mystery tongue terror is only in the finish well after swallowing.

The beers in question have had a minimum of 3 weeks in fermenters. Some have been kegged or bottled for over 2 months with no discernible quality change.

If I gulp the beer it is drinkable but I am thinking about just saying to hell with it and going back to using extracts. Any help would be overwhelmingly appreciated.
 
Sounds like you've done a lot to try to figure out what the issue is. Being that you are having a hard time describing what is off, it might be useful for you to bring your beer to someone who knows what off flavors taste like. I'm guessing you don't have a BJCP judge friend/neighbor because you would have thought of that already. Maybe a local club with an experienced brewer? Hell, I submitted a beer that I knew was a little off into a competition ($4 entry, so a pretty cheap diagnostic test).

My initial thoughts:

-When you say aspirin-like, I think of that kind of bitter/dry that I personally associate with tannins. Hard to describe but it makes me think of sucking on sawdust or a tea bag. I may be way off in this because I'm not particularly experienced. Have you looked into your water, specifically mash pH?

-Could it be oxidized? I'm trying to think of things that could happen to a whole batch at a time if handled incorrectly.
 
Agree with above about your problem. Sounds from your description like astrigency from tannin issue. Adjust your mash pH and make sure you are not over sparging/sparging too hot. Get a water report and use one of the available sources of information about water treatment to get things in line.
 
It sounds like a water and mash pH issue.

Are you using tap water? If so, do you have any idea of the make up of it? Do you treat for chlorine/chloramine? Maybe you could get a water report from your water utility, and that will help a lot.
 
Ah, also, if you are using outside water, are you using a white RV water hose? If you are using a green hose, I can guarantee that's the issue. I learned that one the easy way too.
 
I've never had problems using my garden hose. But I have a short hose and let it run several minutes before starting when I do it.

These days, though, I fill from the indoor tap and carry it out.
 
my last AG batch I made a simple smash 9.5 lbs of domestic 2 row and 2 oz centennial og 1.052 I used .5 tbsp. of 5.2 ph stabilizer. after boil split the 5 gal into 2 small carboys about 2.5 gal into each. one I pitched us-05 the other -04 just for kicks.

I just opened one warm and under carbed but it seems to taste ok. I think it was the mash ph. The only thing procedurally different is the 5.2 stabilizer.

I made a hose just for filling my brewing rig out of food grade vinyl tubing. I am paranoid about temperatures and use at least 2 thermal guessing sticks to check my water temps. Sparge water is normally at 167 to 169 then I kill the heat and start the sparge. The first AG batch previously mentioned I over sparged so now I check my runnings and stop sparging at 1.015 ish to minimize over extraction.

I think I will have to look into the acid malts to adjust my recipe's from here on out.

I am actually very happy with this beer, lol its a real easy drinker even warm and green. I guess I will have to use distilled water and build it up to suit the beer style. Thank you very much for the input.

Side note I am very glad this didn't end up a wild goose chase like the thread by theslash a few years back. I will necro this thread in the future to gice updates after my next couple batches get some grey hairs.
 
First, ditch the 5.2 stabilizer stuff. This has a bad flavor impact in my (and many others') experiences. See the brew science forum for more on why you should not use this product unless you have a full water report and know why you'd need it. (And even then, you don't need it).

Anyway, get a water report for $26.50 unless you know your water is bad (like if it tastes terrible). Also, make sure you treat for chlorine or chloramine if you don't have well water.

It sounds like a water issue, and it may be very easy to fix.
 
For whatever it's worth, I've never used the 5.2 stabilizer and only recently started using a few oz of acidulated malt in my mashes. I've never had an issue with mash pH though I've got pretty soft water here in Atlanta.
 
In regards to the water, I have city water and run it through a brita filter that attaches to the sink faucet. Never had issues with homebrew funk or off flavors, so that could always be an option for adjusting water.

Water report is the way to go for sure, but I've been getting exceptional results with the filter so I haven't bothered paying for the report.
 
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