Rao-Perger Classic — Brew Water Concentrate for Pour Over
Rao-Perger Classic — Brew Water Concentrate for Pour Over
Add to distilled or RO water. Stir, brew, enjoy.
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The Scott Rao and Maxwell Colonna-Dashwood benchmark formula. Balanced GH and KH deliver equal weight to body and acidity — the reference point most specialty water recipes are measured against.
How to use
How to use
What you'll need
- Scale (1g precision)
- Glass jar, 600ml or larger
Step 1 — Make the concentrate
- Add the mineral packet to a 20oz glass jar
- Add 500g boiling water (tap water is fine)
- Stir and cool to room temperature
Step 2 — Dose your water
Use the included micropipette to add concentrate to distilled or deionized water.
Dosing guide
- 170 ml water → 10 drops
- 1 liter → 2.5 ml
- 1 gallon → 9.5 ml
Ingredients
Ingredients
Food-grade minerals, measured to 0.01g precision.
Formulated to SCA-recommended GH/KH targets for specialty coffee extraction.
What's in the box
What's in the box
Includes: 1 mineral concentrate packet + 2 precision micropipettes
Each packet produces 52+ gallons of brew water — roughly 800 cups of coffee. That's about $0.03 per brew.
Ships within 1–3 business days via USPS. Free shipping on orders over $35.
