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Messages - narcout

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All Grain Brewing / Re: Frustrated beyond belief
« on: July 06, 2015, 11:23:07 AM »
I brew with RO water. My tap water is pretty much liquid dry-wall, so it's not well-suited to brewing. I have made adjustments in the past with Palmer's spreadsheet. I was always successful, for the most part, but I stopped making adjustments when my product began to go south, just in case I was over-adjusting the mineral additions.

Are you brewing with RO water and not adding any minerals back?  Are you checking your mash pH?

How'd I do?

I believe I picked the beer on the lower right as being different, but I can't remember what color square it was on. 

Equipment and Software / Re: Stainless Rust
« on: July 06, 2015, 09:22:43 AM »
I too was going to suggest Bar Keepers Friend.  That stuff is amazing.

Beer Travel / Re: River Cruising
« on: July 03, 2015, 11:12:20 AM »
My preference is backpacking and staying in hostels.  I went to Amsterdam and Antwerp over what was basically a long weekend back in 2006 (maybe 3 days in each city).  I probably spent less than $75 a day not including airfare. 

The hostel in Antwerp had a bar on the first floor.  We met some awesome locals there who took us out to some of their favorite spots.  It was a blast.

If hostels aren't your thing, you can often rent people's apartments for a few days if you're in a decent sized  city.  My wife and I did it in Barcelona a few years ago.  It was less than half the price of staying in a hotel, and we had our own kitchen (another good way to save money) and patio.

General Homebrew Discussion / Re: Silicone
« on: July 03, 2015, 10:09:00 AM »
What are you using it for?  If you are making a mash tun out of a cooler, it really shouldn't be necessary.

Edit: Regarding cooler materials, the interior liners of Igloo brand hard-sided coolers are made out of FDA-grade polypropylene.

Equipment and Software / Re: Orbital Shaker
« on: July 02, 2015, 08:00:35 PM »

Yeast and Fermentation / Re: Harvesting some yeast
« on: July 02, 2015, 09:18:33 AM »
Guess what happens if we serially repitch a starter versus serially repitching yeast cropped from a normal gravity beer?  If you guessed that the yeast culture loses vitality more rapidly, then you are correct.

If you are serially repitching, do some of the cells from the original generation stick around for subsequent fermentations?  At what point do the cells from the original generation die off to be replaced completely by newer cells? 

Actually, yeast cells consume O2 whenever it is available, which is why the "Don't rack to secondary because it will oxidize your beer" mantra is yet another home brewer created myth.

Is there a temperature below which they will stop consuming oxygen?

Classifieds / Re: Equipment wanted
« on: July 02, 2015, 09:08:56 AM »
If you want them, just PM me your address. 

I really don't want any money, I'd be happy enough if someone can put them to their intended use.

Extract/Partial Mash Brewing / Re: Trippin' about my dry hopped IPA
« on: June 30, 2015, 08:18:08 PM »
I think a wort chiller might be added soon, maybe a glass carboy. What would you recommend?

If you are doing a partial boil and topping off with room temperature filtered water (as you mentioned above), I bet you could avoid having to purchase a wort chiller if you chilled your top off water in the fridge.

You can use cheap rum or vodka for your airlock instead of Star San if it's foaming up and driving you nuts.

Ingredients / Re: Best Malt Brands
« on: June 30, 2015, 08:02:42 PM »
I've had good results with Castle (Belgian Pils).  I also like Simpsons for crystal malts.

Classifieds / Re: Equipment wanted
« on: June 30, 2015, 08:00:51 PM »
Glad to see you are going to be brewing again.  All I have to offer is a pair of faucets (the regular, chrome-plated, rear sealing kind).  Totally unused.  Free if you want them.

Equipment and Software / Re: Orbital Shaker
« on: June 30, 2015, 09:16:19 AM »
I found something interesting re agitation (though perhaps not conclusive):

"As can be seen from Fig. 1, the increase in agitation speed from 50 to 250 rpm led to an increase in biomass production (Fig. 1). This paralleled with the increase in the specific growth rate, sugar and nitrogen consumption and pH reduction (Fig. 2). However, the effect of increased mechanical agitation on the viability of Saccharomyces cerevisiae appears to be negative, with higher levels of dead cells present at the end of the cultures (Fig. 3).

Previous works [20] on the effect of mechanical agitation on the viability of yeast cells did not report cell damage at agitation speeds values higher than the maximum value used in the present study. Since in this work, the nutrients (carbon and nitrogen) consumption increased with increased agitation intensity (Fig1), this last variable is unlikely to have a physical effect on the growth of Saccharomyces cerevisiae.

Thus, the loss of viability observed at the end of the cultures could be due to the depletion of both carbon and nitrogen sources (Fig. 2) rather than to fluid-mechanical stresses caused by agitation [20]. However, the combination of both effects with the production of toxic metabolite (such as ethanol) may cause higher loss of viability than each factor alone."

Equipment and Software / Re: Orbital Shaker
« on: June 30, 2015, 08:42:13 AM »
Thought I would show pictures of my twins.


Can you describe your process (do you oxygenate or aerate the starters prior to using the shaker, how vigorous is the agitation, do you decant the supernatant, etc.)?

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