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Bluelab Combo Meter california 1 Gallon Armor Si is suitable 1 Gallon Armor Si is suitable for all types of plants during all stages of growth Extra attachment with a detachable waterproof floor tray to hold soil and fallen leaves °F) Calibration of the pH is simple with the push buttons on the meter and fresh calibration solutions Conductivity and temperature do not need to be calibrated as this is locked in during manufacture
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