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Strange sediment, accidentally frozen beer & clarity question

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jpiro

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First post, but I'm sure it won't be the last. I started homebrewing a year or so ago, and just ran across something I haven't seen before so I figured I'd ask the forum.

After a week in the primary, just over a week in the secondary and two weeks in bottles, I noticed that my Double IPA had a strange, blackish sediment along the sides of the bottles. Some had more, some had less, but they all seemed to have it. So, I popped a few bottles in the fridge to give it a try. The beer was cloudy but delicious, so I didn't think it was an infection and chalked it up to either A) yeast buildup that just happened to be darker than I was used to or B) a result of the dry hop I'd done with pellets in the secondary, since it was the first time this had happened and also the first time I'd dry-hopped.

I'd love any thoughts on what that sediment might be, but my confusion doesn't stop there.

Wanting to try a few more beers, I stuck two in the freezer to quickly chill them. Then, I promptly forgot for a few hours. I stuck the beers in the fridge overnight to thaw, and when I went to retrieve one the next evening I noticed that the blackish sediment was now not on the sides of the bottle, but at the bottom. Also, when I poured the beer it was far less cloudy than the first two.

I did it with a couple more beers, and they also seemed clearer and no less tasty. So my question is whether I should keep freezing/thawing beers to increase clarity or if I might somehow be damaging the beer by doing this?
 
What you have is normal, you did what they call "cold crash". You can put the rest of the bottles in the fridge with no ill effects. Welcome to home brewing!
 
Agree with the poster above, but would add that freezing is not necessary to do an effective "Cold Crash", you can get the same effect by chilling the beers down to 30-35 degrees as quickly as possible. The sediment and some of the haze-producers will drop out as a result.

As far as the sediment, I'm not sure what it is from the description. Do you have any pics of it?
 
I can try to post a photo later (I'm at work now) but they're in brown bottles so it might be hard to shoot.

Basically, it looks like black dots going up the side and neck (though never above the liquid) of the bottles. When held up to light and moved, you can see a bit of whatever it is waving in the liquid, where it looks a bit stringy.
 
Odd, I'm not sure what that is. If you can pour one out into a glass and snap a pic of the stuff, somebody on here will probably recognize it.

Edit: if it will even come out of the bottles, that is
 
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