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Yes, I think it's supposed to. I'm beginning to realise I've been here before. Only two or three months ago: Alkalinity/pH and salts again! - Homebrew Talk Forum. As I get older am I not to expect this "repeating myself" caper? Slightly different approach, slightly different emphasis, different...

Humm ... I'm going through a bit of a disillusioned period with this "RA" business: I knew I'd seen stuff discrediting Kolbach's work and Palmer's slavish attitude towards it. But I'd past it off as "sour grapes" as I was finding "RA" so easy-peasy to introduce into what I wanted. But seeking...

Don't! The precipitated carbonate will eventually dissolve again (convert back into bicarbonate). Or some of the finely divided suspended precipitate will. But something triggers it to create calcite concretions on surfaces (enamel preferred over stainless steel, perhaps?). You are getting me...

(Followed by John Palmer's video of one of his classroom talks). "Something so simple" ... like in Mr Palmer's talk? ... 😵‍💫 That was a poorly put together argument! Unfortunately, Mr Palmer's talk didn't cover how Paul Holbach's "RA" equation holds up to different mash ratios and grist...

Think I've just answered that one?

Aww, cwap. I'm back to beginning hoping to figure out where that "3.5" in the RA formula comes from and how best to modify it for my own environment? I haven't had time to go over those tables yet, but "RA/pH·L" is a new one on me, and the inclusion of "pH" makes me very suspicious. I might need...

Patience! I used to boil my brewing water. It had to be left at least overnight to settle before I'd see a light dusting of calcium carbonate (chalk) fall out onto the bottom (but I was living in "soft" water areas, except for when in Leicester, so there was never much anyway (we didn't really...

Yeah. I'd like to find that. I've only come across hints ... until you whacked it into me just now! But how does Holbach's equation hold up to different mash ratios and grist size?

Ha! That's one that's been bothering me. Because "Residual" is figured before the event (mash). "Residual Alkalinity" ... to be? Nope, I meant milligrams 'cos I'm talking about real ion concentration ... milliequivalents has switched over to a fantasy world. Like "as CaCO3" ... ah, okay, maybe...

I found the four articles, all from June 2016: Brewing Liquor for Pale Beers (0–10 SRM) Brewing Liquor for Amber Beers (10–20 SRM) Brewing Liquor for Brown Beers (20–30 SRM) Brewing Liquor for Dark Beers (30–40 SRM) I'll flick through them later. Thanks. I don't really want "a simpler way"...

As an idea of what I have in mind with this "RA" stuff: John Palmer puts out a whole load of stuff on "RA" including an illustration of how it might appear on a graph. He chose a 3D "Rubik Cube" style graph to put it on. I thought it could be done on a 2D three axis (triangular) graph, but it...

Too right! Thanks for the introduction ... 🧌 It's not even "Hardness" in modern parlance, it's "Carbonate Hardness" ("KH"), caused by anions, not multi-valence cations with which it might be associated ... blah, blah, blah! Could have summit to do with the surface, one being metallic, the...

Thanks, :thumbsup: "Interrelated subgroups"? Heck. I'm not a patch on Murphy's am I. "Pragmatic" seems to describe it well. But don't be turned off "RA" because of the reams of cr** written over it (by other people with not a clue). It really is straightforward, something I'm only appreciating...

I do? ... Oh. It's all right. A contradiction of nothing is ... nothing? Now fill in any blanks you seem to have "forgotten"? 👍😬

... Gmpha-phripp ... ... grrr ... nnn...Okay! "Atomic Weight" of Calcium Carbonate is 100 (actually, the tiniest smidge more at 100.09), Valence of Calcium and Carbonate ions is 2. "Milliequivalents per Litre" of 1mg/L Calcium Carbonate is 1/2*100 = 50. All "Milliequivalents per Litre" of any...

Don't need to! The "Defuddler" that calculated it is now so mind-boggling complicated that I dare not question its calculations. With all these RAF machines whizzing about overhead I worry that the "Defuddler" might organise an "accident" over my house. It's calculated RA of my water as -7.0...

I'm back! I'm not going to question "established wisdom". I'll do what I usually do and question many peoples' interpretation of established wisdom! And I know my interpretation needed questioning which is why I started this thread. Because I'm criticised for making simple subjects (?)...

Sorry @SMP Brewery; don't know what happened with that edit to my earlier piccie/post (it was the defaults, not your water at all). But here's a replacement: I'll try not to get rushed in future! I think you had a good earlier copy from before I edited the thing (disasterously!).

I think I've found it: See Derby's Main Centre before it was flattened to make way for Intu So much for "is still there (I think?)"!

Nope. It was in Derby town centre. A (then) new "supermarket" in a new-fangled "shopping precinct". (It was even capped with a real "Disco" too, full of kids, later to include me, drinking the very "best" 🤭 "keg" beers ... and a car-park if you could afford a car). The UK I guess wanted to...