I want to talk about preparing basic microbiological growth media and things that can go wrong when swapping reagents.
Weird cloudy KB Agar
A while ago, I was preparing KB Agar:
Recipe for 1L KB Agar
10g Glycerol
20g Peptone
1.5g K2HPO4 trihydrate
12g Agar powder
5 mL sterile 30% MgSO4 solution (to be added after autocla...

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