Months of Grind and Temperature Tweaks Did Nothing; a Filter Pitcher Fixed the Sourness
6 sources researched
r/Coffee spent the week on one brewer's months-long fight with a sour edge: grind size, temperature and ratio all changed, nothing worked, and a basic carbon filter pitcher did. The thread's answer is an order rather than another recipe — remove chlorine and chloramine first, put alkalinity and hardness in range second, adjust grind third, temperature last. The SCAE water chart supplies the range, Marco Wellinger explains why alkalinity outranks pH, and of the 31 comments read most agree the water came first; one strong reply argues the returns collapse if your tap already sits near target.
Quotes
Quotes“One liter of average US tap water with 150 ppm CaCO3 alkalinity can neutralize 100 L of acidic rain at pH 4.5.”
“If only more people would realize how important water is instead of dropping $$$ on useless gear.”
“honestly the $20 filter pitcher fixed my sour cups better than the grinder upgrade ever did”
“I would start by measuring what the filter actually changed. A cheap aquarium GH/KH kit and a TDS pen give you alkalinity and hardness, and that alkalinity number is what moves perceived sourness most.”
“Diminishing returns - my tap water is pretty close to the Hoff ideal so haven't bothered adjusting it.”
Facts
FactsChlorine first, grind last — The fix in the thread was removing chlorine and chloramine, not adding minerals: the SCAE water chart lists both as flavour defects at concentrations you cannot smell in the water itself, so they sit upstream of grind size or temperature (
chart).
The SCA target range — The SCAE water chart, the reference the specialty community uses, puts alkalinity at 40–75 mg/L as CaCO3, total hardness at 50–175, pH at 6.5–8, asks for no chlorine or chloramine, and caps conductivity at three times the alkalinity figure (
Alkalinity, not pH, decides sourness — Marco Wellinger puts alkalinity's effect on finished acidity several hundredfold above pH's: 1 L of average US tap water at 150 mg/L alkalinity neutralises 100 L of acid rain at pH 4.5, so a pH strip near neutral says little about how sour the cup will taste (
SCA 25).
A pitcher cannot soften water — Carbon block filtration targets chlorine, chloramine, taste and odour compounds and leaves hardness and alkalinity largely where they were; changing mineral content takes reverse osmosis or distilled water plus a profile such as Third Wave Water's packets or BWT's magnesium cartridges (
BWT,
Third Wave Water).
Voices
VoicesAdvice · Reddit · r/Coffee — Measure before buying packets — u/kaldoiumlin33 says to start with a cheap aquarium GH/KH kit and a TDS pen, get the free utility water report, then run a blind triangle; if you cannot pick the odd cup reliably, packets are diminishing returns (
comment).Verdict · Reddit · r/Coffee — Water beats gear money — The thread's top comment, at 93 points, says people drop money on "useless gear" before water, and gives his own recipe: distilled water with Epsom salt and baking soda, credited to Hoffmann's book (
comment).Verdict · Reddit · r/Coffee — A $20 pitcher beat a grinder — u/jfn543 reports the same result in one line: a cheap filter pitcher fixed sour cups better than the grinder upgrade ever did (
comment).Objection · Reddit · r/Coffee — Returns shrink if tap is close — u/cliffx calls mineral packets diminishing returns because his tap already sits near the Hoffmann target, and suggests the utility report plus brewing software before buying anything (
comment).
AI-written from public sources and may contain errors. Check the sources yourself.
