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Originally Posted by sgarron  It was my understanding that temperature effects ph readings. Even on the calibration solutions it states 7.0 at 77 degrees. I also read that the outdoor air test shouldn't be done in cold weather. |
But you can take the water outside to aerate in and bring it back inside and heat it up. The CO2 inside the house shouldn't affect the pH significantly as long as once you bring the water back inside, you don't install the powerhead or air bulb that mixes the air with the water.