General Category > Equipment and Software

A New Mash Chemistry and Brewing Water Calculator

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When I looked briefly at the calculator earlier this week, it appeared to have a mash pH estimation option based on the same premises as Bru'n water.  These mash pH calcs are based like Bru'n water on the grain bill, color contributions of the malts and type of malts (base, caramel, roasted, acidulated).  I would be surprised if Bru'n water and Kai's calculator at this time provide different significantly different results.

Ease of use could be a difference maker here.

We just released version 1.3 which has a few notable enhancements:

- option to show overall water and mash pH at the bottom of each section. That will reduce the scrolling needed when you try to match a profile or mash pH.
- support for CRS/AMS, which is a HCL/H2SO4 mix used by our UK brewing friends
- support for malt pH parameter entry as DI water pH or acdidity in mEq/kg. That's for folks who know these parameters.

We are working hard on the integration into the recipe editor but want this to work well and intuitively. That's why its taking its time.


Hi Kai,
I use very often Mash Chemistry and Brewing Water Calculator because I have a reverse osmosis filter so I use this calculator in my home brewery. On forum I'm a some kind of support for people which try to start with modification of water.
I decided to write to you because I have a problem with one thing (not only me - everyone who use a RO filter).
I dont know excactly what should I put in Source Water fields when I use a RO water. I used to put "1" everywhere (including Bicarbonate and pH) - I am not sure if it is a good way. The biggest problem are fields: Bicarbonate and pH. This parameters discriminate all problems with Mash pH. I tried to put differents values (f.ex. Bicarbonate=1 and pH=5 or 7) and calculates were ok but ... the MASH PH never be correct. pH is always lower then calculator shows. Sometimes pH in real is very low (I have good pHmeter and I am sure that it mesures good - I have 2 samples: 4 and 7).
For example - please look at this profile:
Calculator says: Mash pH *: 5.95 but pHmeter mesured: 5.22
Next example:
Calculator says: Mash pH *: 5.64 but pHmeter mesured: 5.15
Next example:
Calculator says: Mash pH *: 5.72 but pHmeter mesured: 5.25
Next example:
Calculator says: Mash pH *: 5.7 but pHmeter mesured: 4,99
On the beginnig differences werent so high (f.ex. 0,3-0,4pH) but lately ... is very high: sometimes it is 0,7-0,8pH. It is very difficult to set all minerals because I dont know what is going on.
My equipment didnt change. I borrow from my friend a pHmetr because I thought that there is something wrong with mine but this second one showed almost the same results.
My friends use RO water too and have the same problems.
Can you please look at it and help us with this problems: what put in Source water fields when we use a RO water and what is going on with calculates of Mash pH.
Be very grateful for any help
Best regards

Sadly, Kai is gone. We are TRYING to carry on and keep the knowledge flowing. Head on over, and we will get you squared away.

Gone?  You mean, like, gone from this Earth??????


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