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Grow QuestionsPH calibration and level

PH calibration and level

BarrelOfTheBongstarted grow question 3 years ago

Can I keep my ph calibration fluid to use it more than once? I am ph testing my water for the first time tonight, autoflower growing in soil. What is the optimal ph?

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MrStinkyanswered grow question 3 years ago

You can keep the solution, if you can keep it totally free of contamination. If you use meter every day or so you will probably not need to recalibrate very often. Best just to get the powders and some dionized water and recalibrate in between each grow. Optimal pH for autos in soil - 6.0-6.5 - I go with 6.38 every time.

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