Pictured: Safale US-05 via MoreBeer
I periodically brew small batches that require less that a full packet of dry yeast. See: Small Batch, All Grain Stove Top Brewing + Water Calculation Spreadsheet. For that matter, sometimes larger beers require a full packet plus.
Here’s the procedure I use…
- Determine the proper amount of yeast using a pitching rate calculator.
- Prepare the proper amount of re-hydration water. Generally, you’ll prepare 10 grams of water for every one gram of yeast needed, but consult manufacturer’s directions. Check out Tip 1 on our tips page for how I do this using a lab bottle in the microwave.
- Put the prepared rehydration water on an accurate gram scale [review]. Make sure the scale has a “tare” feature or otherwise account for the weight of the container and water.
- Zero the scale out using the tare feature.
- Cut the yeast packet open and slowly pour the yeast into the rehydration water. Careful, there’s no going back if you pour too much. 🙂
- When I get the amount of yeast I’m looking for, I immediately seal the yeast packet (if it’s a mylar type material) using the heat strip sealer on my vacuum sealer.
- I write the amount of remaining yeast on the packet using a Sharpie and then seal that in vacuum bag for additional protection.
This is quick and easy, reduces waste and saves money.
Some gear and ingredients to consider…
- FoodSaver Vacuum Sealer V2244 – Review
- Autoclave Safe, Microwave Safe Lab Bottles
- Infrared Thermometer
- American Weigh 100g x 0.01g Digital Scale – Review
- Safale US-05 via MoreBeer
- Safale S-04 (3 ct.11.5 g Packs) via Amazon
- Safale US-05 (3 ct.11.5 g Packs) via Amazon
- Dry Yeast at William’s Brewing – carry a variety of manufacturers and strains including (as of this update) Safale, Lallemand, and Mangrove Jacks
Need a pitching rate calculator? Check out BeerSmith
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