Jar with liquid medium, agar, and "smidgens spoons"
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Level pinch spoon of powdered agar
Add one level "pinch" spoon of agar to 45 ml liquid medium; add one level smidgen spoon of agar to 30 ml liquid medium
The "smidgen spoon" measuring system was introduced to us by a Ph.D. chemist in Georgia. Note that you can also use these to measure Gellan Gum and carrageenan. I recommend 1 level smidgen spoon of either of those per 30 ml liquid media.