I am looking to obtain Randy Moshers Ideal Pale Ale water as per the Electric Brewery Pale Ale recipe.
I have a few questions:
1) When using RO water should I enter my source minerals as 0? I have read the RO water is essentially a blank canvas.
2) Will HCO3 also be 0 on RO water?
3) What should be the target HCO3 as its not listed in the recipe.
FYI I will be treating all of my water (20 gallons) in the HLT to match Randys profile. I know we have discussed this in a previous topic but for my first brew day Im just trying to keep it simple.
Joined: 12 Dec 2010 Posts: 10408 Location: Ottawa, Canada
Drinking: German Lager, Electric Hop Candy Jr, London Pride, Weizen, Citra DIPA, Dubbel, Russian Imperial Stout, Black Butte Porter
Working on: Kolsch
Link Posted: Fri Nov 04, 2016 12:45 pm Post subject: Re: Randy Moshers Ideal Pale Ale Water Profile
rivetcatcher wrote:
1) When using RO water should I enter my source minerals as 0? I have read the RO water is essentially a blank canvas.
Correct.
Quote:
2) Will HCO3 also be 0 on RO water?
Correct.
Quote:
3) What should be the target HCO3 as its not listed in the recipe.
That's not really a question that makes sense. Let me explain:
The HCO3 (bicarbonate) level, or sometimes referred to as alkalinity (CaCO3) (same thing basically - just expressed differently), is a measure of how much acid the water can neutralize. If any changes are made to the water that could raise or lower the pH value, bicarbonate/alkalinity acts as a buffer, protecting the water from sudden shifts in pH. Minerals (salts) in water increase the bicarbonate/alkalinity level. Hard water (water with lots of minerals) will have higher alkalinity.
So higher alkalinity simply means that the water's pH is not going to change as much when adding salts that change the pH up or down, or when adding something like lactic acid to lower the mash.
Add salts to get the flavour profile you want first (for example, Randy's ideal Pale Ale numbers that you mention) and don't worry about then bicarbonate/alkalinity level. Then measure your mash pH and if it isn't low enough (either because there's not many dark grains to help bring the pH down far enough and/or your water has a high bicarbonate/alkalinity level) you can add some lactic or other acid until you hit the target. We don't usually add more salts that help bring pH down in order to hit a target pH because the salts also play with the flavour while straight acids will not (as long as used withing certain limits).
So there really isn't a "target" alkalinity for a beer recipe, at least not one I concern myself with. That said, really hard water (high mineral content to start with) is usually high in pH and will have high alkalinity and you often won't be able to hit the salt/mineral profiles you want to start with. So there's certainly water that will never work well to hit certain target salt numbers, but you'll know that right up front by plugging in the numbers.
EDIT: I took a look at the link you provided to brewersfriend and they do seem to offer alkalinity "targets" for certain profiles and show how adding chalk or baking soda makes the water harder (higher alkalinity) and give suggestions on whether the alkalinity level is suitable for light/amber/dark beers, or possibly too high and they suggest cutting with RO water. Most brewers do not use these salts (I don't usually). I also don't try to purposely make my water harder for certain styles (would make sense mostly with some UK styles I would imagine). For what it's worth, if you're using RO water with basically zero alkalinity, I would therefore not worry about alkalinity. If someone was using really hard water (high alkalinity) they likely won't be able to hit most salt targets because the numbers will already be too high so they need to dilute. So a bit of a catch-22 which results in alkalinity as being something I don't recommend people worry about if they're adjusting their water as they'll find out right at the start if it's too high (high alkalinity = high salt numbers).
Joined: 12 Dec 2010 Posts: 10408 Location: Ottawa, Canada
Drinking: German Lager, Electric Hop Candy Jr, London Pride, Weizen, Citra DIPA, Dubbel, Russian Imperial Stout, Black Butte Porter
Working on: Kolsch
Link Posted: Fri Nov 04, 2016 2:04 pm Post subject:
Sounds about right.
Randy Mosher's ideal pale ale numbers are: Ca=110, Mg=18, Na=17, Cl=50, S04=350
I tend to go a bit lower on SO4 like so (but it won't make a huge difference): Ca=110, Mg=18, Na=16, Cl=50, S04=275
When I plug your numbers into EZWaterCalc assuming RO water (all zero's) to start and 20 gallons, I get:
Ca=101, Mg=26, Na=0, Cl=57, S04=278
So very close to my numbers. Don't worry about the lack of Na, though if you want some, a pinch of regular salt (NaCl) or baking soda (NaHCO3) can get you there.
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