Search found 109 matches

by Silver_Is_Money
Tue Mar 31, 2020 1:39 pm
Forum: Kit Brewing
Topic: Alcohol Content / ABV
Replies: 8
Views: 184

Re: Alcohol Content / ABV

There are no math models that can reliably predict ABV from SG and FG over a broad range of values. All math models are merely approximations. They are not reality.
by Silver_Is_Money
Mon Mar 30, 2020 7:17 pm
Forum: Fermentation
Topic: Reusing Dry Yeast.
Replies: 9
Views: 227

Re: Reusing Dry Yeast.

How long can it be refrigerated?
by Silver_Is_Money
Wed Mar 25, 2020 12:22 am
Forum: Brewing Liquor
Topic: A question about Calcium
Replies: 8
Views: 240

Re: A question about Calcium

Alkalinity should be a concern as big as, or even larger than, the concern for the calcium level.
by Silver_Is_Money
Fri Feb 21, 2020 11:53 am
Forum: Brewing Liquor
Topic: Water treatment help.
Replies: 4
Views: 353

Re: Water treatment help.

On first guess (since it wasn't specified) your mean Alkalinity (as CaCO3) appears to be in the ballpark of 165-175 mg/L. That would place mean bicarbonate at ~201-214 mg/L. If the above proves to be accurate, then to reduce Alkalinity such that your water is at ~5.4-5.5 pH should require the additi...
by Silver_Is_Money
Fri Jan 31, 2020 3:33 pm
Forum: Brewing Equipment
Topic: SG and "the elephant in the room"
Replies: 11
Views: 605

Re: SG and "the elephant in the room"

Just to make that clearer for other folk that might read this: Those measures are with a "proper" scientific hydrometer that has been calibrated against a 4C reference sample of pure water. A "brewing hydrometer" will be calibrated to a nominally (often more like "roughly") 20C reference where wate...
by Silver_Is_Money
Fri Jan 31, 2020 1:53 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

Heron1952 wrote:
Fri Jan 31, 2020 1:51 pm
Your release dates still think its 2019!!!
Thanks much!!! Fixing it now. My old (retired) mind hasn't adjusted to 2020 yet. :oops:

Edit: It's been fixed. Thanks again.
by Silver_Is_Money
Fri Jan 31, 2020 1:45 pm
Forum: Brewing Equipment
Topic: SG and "the elephant in the room"
Replies: 11
Views: 605

Re: SG and "the elephant in the room"

You are correct specifically (and only) for the case whereby you read density via your scale method at 4 degrees C, and then correlate that scale measured density directly to specific gravity as "beer hydrometer" measured at 20 degrees C. The density of deionized water at 20 degrees C is 0.9982, and...
by Silver_Is_Money
Fri Jan 31, 2020 1:07 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

I think you now have a very heavy workload to complete. 'Mash Made Easy' version 8.45 has just been published to my website. The spreadsheet is free and complete. There is no pay version. Available in both US and Metric versions. Change made: Reduces the downward pH shift impact of calcium and magn...
by Silver_Is_Money
Thu Jan 30, 2020 3:31 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

It turns out to be the case that specifically for the criteria of a "Congress Mash" the only way to get Kolbach's formula for the depression of pH via the presence of Ca and Mg ions to fully comply with D.G.Taylor's direct observation (as peer reviewed in 1990) is to multiply Kolbach's 1950's era fo...
by Silver_Is_Money
Thu Jan 30, 2020 12:24 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

Oh dear. It appears to have got complicated again just when I'd worked out how to use the GW calculator! If I use the recommendation from dry pale ale will I be in the right ball park? Please bare in mind I've done no water treatment really before for last 15ish brews so anything probably an improv...
by Silver_Is_Money
Thu Jan 30, 2020 1:59 am
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

Eric, you presently have me evaluating the degree of downward shift witnessed for mineralization with Ca and Mg, as it appears that currently the drop witnessed within MME is potentially excessive vs. the defining work of Kolbach and Taylor* in this area. Stay tuned for a correction within Mash Made...
by Silver_Is_Money
Thu Jan 30, 2020 12:40 am
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

I'm following this bit. I can but assume you have not accounted for the upward shift in pH due to the additional alkalinity in 37 litres compared to that in 18? I have accounted for the change in mEq's due to alkalinity, but that is a separate issue from what is going on due to Ca and Mg mineraliza...
by Silver_Is_Money
Wed Jan 29, 2020 10:16 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

Calcium's molecular weight is 40.078 g/mol. It's "Equivalent Weight" is half of that, due to its valence of +2. Eq_Wt of calcium = 20.039 g/Eq = 20.039 mg/mEq 100 mg/L / 20.039 mg/mEq = 4.9903 mEq/L 18L x 4.9903 mEq/L = 89.83 mEq's of calcium 53.4 mg/L / 20.039 mg/mEq = 2.6648 mEq/L 33.7L x 2.6648 m...
by Silver_Is_Money
Wed Jan 29, 2020 9:57 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

Eric's initial attempt at using MME above appears to me to be a great example as to why, in today's world where some sparge and some do not, serious consideration should be given to adding minerals via mEq measurement as opposed to via ppm (mg/L) measurement. For a more traditionally normal mash whi...
by Silver_Is_Money
Wed Jan 29, 2020 8:09 pm
Forum: Brew in a Bag
Topic: Ro or tap
Replies: 200
Views: 5909

Re: Ro or tap

I agree with 0.1 mL of CRS required per Liter if the goal is to have water with ~20 mg/L (ppm) alkalinity. (38-20)/50.04345 = 0.3597 mEq/L of alkalinity to be removed 0.3597 mEq/L * 33.5 L = 12.05 mEq of alkalinity to be removed 12.05 mEq/3.66 mEq/mL = 3.29235 mL of CRS to be added (where 3.66 mEq/m...