Fermentation temp readings with water bath

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viking999

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How do you take a fermentation temperature reading if you are controlling the ambient temperature with a water bath? I would presume that those stick-on thermometers would be unreliable because you don't know if it's reading the water or the fermenter.

If I do have to go to all the trouble of taking a sample for a reading, would it be reasonably accurate to just assume it's a few degrees higher than the temperature of the water bath? If so, how many degrees?
 

planenut

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I just assume the temp is pretty close to the water temp and put a thermometer in the water.

Not to thread jack but... On the water bath topic, do you add anything to the water? I went away for a week and when I came home, the shirts on the carboys had begun to have mold growing on them... Nasty!
 

SpaghettiMonster

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I just assume the temp is pretty close to the water temp and put a thermometer in the water.

Not to thread jack but... On the water bath topic, do you add anything to the water? I went away for a week and when I came home, the shirts on the carboys had begun to have mold growing on them... Nasty!
I haven't had that problem yet but could probably just add some bleach to the water.
 

LaurieGator

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I use an algae fixer that is meant for fountains. It is safe for fish and keeps the growths down...
 
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