Search found 16 matches

by chrisr
Tue Jan 29, 2019 8:39 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Brewed again yesterday. Predicted ph 5.5 - measured 5.52.

I hope this 'winning' streak continues...
by chrisr
Tue Jan 15, 2019 7:44 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Congratulations! But I hate mysteries like these! I want to know what's going off. My 'raw' water is very soft and has low mineral levels so I had added Calcium Sulphate and Calcium Chloride. Calcium was predicted at 157ppm. I don't think I've ever brewed with less than 100ppm Calcium.. I have a RIM...
by chrisr
Mon Jan 14, 2019 8:09 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Well, I would have preferred it a bit lower, for a such a pale brew.

It's not a major worry. I just wanted to know if anyone had any explanation why the water calculators went from predicting the pH really well, to being so far out.
by chrisr
Sun Jan 13, 2019 12:50 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Today's brew: all pale malts, so no complications. Brun Water predicted pH5.36. pH measured at room temperature, at both 10 and 15 mins was 5.59. Meter recalibrated before measurements and checked again afterwards. At the end of the mash (75mins), pH5.51.
by chrisr
Sat Jan 12, 2019 8:16 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

I'm brewing tomorrow, an APA, so no dark malts. Used Bru'n Water to setup the water, double-checked it. We'll see what happens...

I'll sample more than one time, this time.
by chrisr
Sat Jan 12, 2019 5:44 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Well, the Salifert test (at double precision) gave the same result for alkaninity I was already working with: 12 mg/L CaCO3.
by chrisr
Tue Jan 08, 2019 6:52 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

So what does they actually mean when I read (for example): "In particular we want to keep the measured pH of our mash in the 5.2-5.5 range with a preference towards the lower end (5.2)."? What 'measured pH' are they referring to? You are saying the time the measurement is taken will influence the re...
by chrisr
Sat Jan 05, 2019 3:41 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

TBH, I'm not getting this TDS thing. It's used it as a quick check just to test if the water composition has changed since last brew day? And all it is measuring is the total mineral content of the water? That would seem, to me, to be more a useful thing to do in a hard water area. Anyone any advice...
by chrisr
Sat Jan 05, 2019 12:18 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

I've ordered a Salifert alkalinity kit. Eric, What does a TDS meter do for me, brewing-wise. I've just read up what it meaures, but how does that relate to brewing? (There's always something new to learn about brewing, isn't there?) Do you mean take the sample later on in the mash? At what time? I k...
by chrisr
Fri Jan 04, 2019 7:22 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

See https://www.stwater.co.uk/my-supply/water-quality/check-my-water-quality/ and enter post code de45 1aa. The Murphy's analysis adds: Alkalinity 12mg/L CaCO3 Calcium 14mg/L Sulfate 20mg/L Chloride 14mg/L I tend to believe them, as we have very soft water, very low mineralisation. A campden tablet ...
by chrisr
Fri Jan 04, 2019 6:04 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Are you saying I shouldn't put any faith the Murphys analysis? It did pretty much match what Severn Trent said.

The old probe is getting on a bit. But I have new one, less than a month old. That gives the same readings as the old probe (once calibrated).
by chrisr
Fri Jan 04, 2019 4:50 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Re: Sudden problems predicting mash pH

Thanks for all your thoughts. I did suspect my pH meter first, as I've had it a while now. So I bought a new sensor. Same readings. Everyone in my area gets their water from the same place, the Ladybower/Derwent dams complex. (That water is sent all the way down the valley as far as Derby and Nottin...
by chrisr
Thu Jan 03, 2019 8:44 pm
Forum: Brewing Liquor
Topic: Sudden problems predicting mash pH
Replies: 34
Views: 2948

Sudden problems predicting mash pH

I’ve been having a bit of trouble hitting the optimum mash pH consistently lately and would appreciate any advice or ideas. I’ve been brewing for years, once I’d started with water treatment I used John Palmer’s water calculator, but about 9-12 months ago I changed to Bru’n Water. When I first start...
by chrisr
Fri Dec 21, 2018 7:28 pm
Forum: Grain Brewing
Topic: St Austel 'Proper Job' Cornish IPA - help please
Replies: 45
Views: 4007

Re: St Austel 'Proper Job' Cornish IPA - help please

Probably improved processes, better quality ingredients and better (IE some) quality control. I don't think a brewery would let a new brewer bring in his own yeast and start using it in their existing brews.
by chrisr
Fri Dec 21, 2018 1:02 pm
Forum: Grain Brewing
Topic: St Austel 'Proper Job' Cornish IPA - help please
Replies: 45
Views: 4007

Re: St Austel 'Proper Job' Cornish IPA - help please

When you say "30 minutes drive", I'd suggest you don't drive. Can you get someone to drive you?! When I was last there in November, the visitor centre had 10 different draught beers on. I think you'd really want to try several :) I did. It's like a mini beer festival. The food is pretty good and rea...