Hello,
My last 2 brews hav'nt gone so well ( off tastes ) hygene and sanitation as usual so i did a Salifert alkalinity test. It gave me a reading of .92
.33 meq/L =16.5 ppm which is different from my water company's report and Murphy's water report from some years ago.
I have to confess that i used The Homebrew forums water treatment calculator in the past but that has disappeared offline, my question is , is 16.5 the figure that goes in the Alkalinity box on Grahams calculator and if i mutiply 16 .5 by .4 does that give me my figure for the calcium box. The figures on my water report should be close enough for the rest of the information.
Thanks Dave
Salifert again
Re: Salifert again
Yes, stick the 16.5 in Graham's calculator and make sure you leave the CaCO3 box selected. And yes, I usually assume the Calcium is around half the CaCO3 figure, which was corroborated by a lab test once. 0.4 sounds like it came from similar advice.
Busy in the Summer House Brewery
- Kev888
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Re: Salifert again
TBH I didn't think there was a reliable way to guess calcium from just the alkalinity figure, at least across different waters. I'm no expert, so stand to be corrected, but is it possible that 0.4/0.5 rule of thumb should be applied to hardness rather than alkalinity?
Kev
- Dennis King
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Re: Salifert again
Get a decent water report from Phoenix Analytical
Re: Salifert again
With only 16.5ppm CaCO3 I'd guess any Calcium is pretty negligible anyway. Adding gypsum/calcium chloride based on a 0.4 figure to a decent profile, surely it won't matter too much if the true starting figure is off.
Busy in the Summer House Brewery
Re: Salifert again
Thanks for all your replies and help,
Regards, Dave
Regards, Dave
- Aleman
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Re: Salifert again
I'd make it even simpler, and just add 150ppm off calcium to whatever is already in the liquor (which won't be much). Your choice as to how much calcium sulphate and calcium chloride should be used to make that 150ppm.
Last edited by Aleman on Mon Jan 29, 2018 12:02 pm, edited 1 time in total.
Reason: spelling
Reason: spelling