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1. Essentials pH Pen Digital Meter Tester Stick Nutrient Management Hydroponics

   Simply dip the probe in the solution and press the CAL button until CAL appears onscreen. Water Resistant.

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2. Essentials pH And EC Meter Pen Bundle Nutrient Management Hydroponics

   All readings are automatically temperature compensated. They have a lifespan of about 1 to 3 years depending on the rate of sampling. All Essential testers are water resistant, which allows for easy washing.

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3. Essentials pH Pen Digital Meter Tester Stick Nutrient Management Hydroponics

   Built in energy saving mode.

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4. Essentials pH And EC Meter Pen Bundle Nutrient Management Hydroponics

   It is water and drop resistant. Simply dip the probe in the solution and press the CAL button until CAL appears onscreen. Even if the tester is accidentally dropped into the water, it will remain afloat.

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5. Essentials pH Pen Digital Meter Tester Stick Nutrient Management

   It is water and drop resistant. Even if the tester is accidentally dropped into the water, it will remain afloat. It is easy-to-use as you can just dip the sensor into the test solution – stir and wait.

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6. Growth Technology Buffer 4 & 7 - 300ml With Essentials pH Meter. Hydro, Aquatics

   300ml of each. For hydroponics, this is often done at pH 7 with Buffer 7 and then at pH 4 with Buffer 4. Note that the optimum pH value for soil is different for hydroponics (usually pH 6.0 to pH 6.5).

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7. Essentials LAB Buffer 7 - ideal solution for calibrating pH meters at pH7. 1L

   Highly accurate pH7 solution. Acidity level: pH7 (Neutral). Shake the bottle before use. Always pour a small amount into another container to test pH, and do not place your pH probe directly into the bottle.

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8. VALUE PACKS! pH BUFFER, EC CF STANDARD, METER-STORE pH4 pH7 250ml Hydroponics

   PH and EC Liquids. It also cleans the probe from any contaminants that may affect the readings. Then insert your probe into the foam and cap it. These solutions are made with high-quality ingredients to ensure accuracy and stability.

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