4 votes
Accepted

My first yeast starter with a stir plate, possibly a disaster

Smack packs contain yeast nutrients, and sugars nothing magical. Its just a mini starter in a bag for proofing yeast for direct pitching. Don't need it at all If doing your own starter. If you do all ...
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4 votes

Alternative to stir plate for yeast starter (and erlenmeyer flask)

I use a 750 ml bottle, sanitised aluminium foil and a rubber band. Keep aerated by stirring it gently, occasionally during the first 12h; I stir every 6th hour or so. After 18-48h I use it or ...
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  • 711
4 votes

Carboy-sized Magnetic Stirring

Yes you can. I've fermented apple wine this way on a DIY stirplate, 1 inch magnet, and a vintage arrowhead carboy (flat bottom). It wasn't powerful enough to make a deep cone for oxygenating which ...
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3 votes
Accepted

Simulating a yeast starter for fine tuning a stir plate

I haven't noticed any difference in the performance of my home-built stir plate between water and wort/yeast with one exception. I often make two-stage starters and refrigerate the flask between ...
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2 votes
Accepted

What is a realistic growth factor in large volume stir plate yeast starters?

'Is such a high growth rate (assuming that everything is optimal) actually possible[...]?' It sure is. Yeast will pretty much grow indefinitely as long as there are no nutrient limitations or ...
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2 votes
Accepted

Alternative to stir plate for yeast starter (and erlenmeyer flask)

You could build a stir plate - you probably already have most the stuff laying around. Step 1: Gather a computer fan, power supply, stir magnet, and neodymium magnets and 2 L mason jars. Step 2: ...
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  • 328
2 votes

Alternative to stir plate for yeast starter (and erlenmeyer flask)

A stir plate does two things. Both can be done manually by swirling your vessel. Provides the yeast a good amount of oxygen. Reduces yeast lost, from lifting out with krausen and drying on the sides....
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1 vote

Alternative to stir plate for yeast starter (and erlenmeyer flask)

I Use various size canning jars, I have the, from .5L up to Half Gallon. I only fill them up Half way to 3/4 full. And when making the starter, I leave the lid partially screwed on. Then during the ...
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  • 1,759

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