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Baldy

Pressure cookers are better than normal pots because the water in the pressure cookers can get hotter than the water in normal pots. The pressure raises the boiling temperature of the water, allowing it to get hotter before it enters the vapor phase. If you're using PF style substrates, I wouldn't reccomend that you get a pressure cooker. They're only neccesary to sterilize grain/seed substrates that really need those high temperatures to sterilize them thoroughtly.