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brewinhard
01/17/11 12:39 PM  
FG using a turbid mash and Bugfarm IV
Just racked my first true turbid mash lambic into secondary glass for aging today and was a bit surprised. The taste and aroma were already well on its way to being nicely sour, funky, and tart. I was a little concerned with the SG at racking though. The beer finished at 1.008! I know those saison blends that Al put in to the bugfarm are quite attenuative, but I was hoping for a higher FG than that from the turbid mash.

Anyone else have any experience with this using a turbid mash and bugfarm IV with FG's at racking time? What have been some of your racking FG (if you did rack even...) after doing a turbid mash? I thought that 1.008 was too low for a long term aging lambic so I added back .5# maltodextrin for the bugs to slowly consume. Maybe I just did a crappy turbid mash and did it incorrectly, and maybe the Bugfarm IV blend is highly attentuative. I just never had such a low FG on an aging sour. Any thoughts?

Al B
01/18/11 11:28 AM  
Re: FG using a turbid mash and Bugfarm IV
I don't think starch is measured gravity wise, so if you performed the first step of a turbid mash and held it at 190F, then you should have plenty of starch for long term (which is much more complex to break down than dextrin).

Al Brux

brewinhard
01/18/11 07:11 PM  
Re: FG using a turbid mash and Bugfarm IV
Ahhhh...that is interesting. I just always thought that both starches and sugars would factor in to the specific gravity of a wort as they are any residuals left behind.

Al, have you ever taken a gravity reading after a primary doing a turbid mash with your wild ones, and if so, do you remember what the gravity was? I know most leave lambics in primary for the duration, as have I with my others, but I wanted to reuse your bugfarm and had to rack to secondary.

Al B
01/19/11 01:58 PM  
Re: FG using a turbid mash and Bugfarm IV
I might have....I don't recall right now. I'm not sure on the starch vs gravity..... just a thought.
 
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