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Step 4: Sterlize the growth medium

Picture of Sterlize the growth medium
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For sterilization we used an old high pressure pan.

- First, pour 500 mls water, preferably destilled, into the pan
- Next, place the closed jars with medium into the pan. CAUTION: do NOT close the lid of the jar tightly! Otherwise the jars may explode while cooking!
- Additionally: put a piece of sterilization indicator tape on the lid.
- Steam the jars for 20-25 minutes into the high pressure pan.