How to correctly measure pH and EC in hydroponics using the Combo Pen P110 Pro
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How to correctly measure pH and EC in hydroponics using the Combo Pen P110 Pro
Hydroponics is an effective and sustainable way to achieve healthy plant growth without the use of soil. The key to success is maintaining the correct pH and EC (electrical conductivity) levels in your nutrient solution. These two values are closely related and setting them correctly will provide you with optimal conditions for plant growth. In this article, we will show you how to correctly measure pH and EC using the Combo Pen P110 Pro , explain the individual values, and advise you on how to keep them within the ideal range.
What is pH and why is it important?
The pH (potential of Hydrogen) value determines how acidic or basic a solution is. The scale ranges from 0 to 14 , where:
- 0–6.9 = acidic environment
- 7.0 = neutral environment
- 7.1–14 = alkaline environment
In hydroponics, pH plays a key role because it affects the ability of plants to take up nutrients. If the pH is too high or too low, plants will not be able to absorb important elements, leading to nutrient deficiencies and poor growth.
Ideal pH values for hydroponics
The optimal pH range varies by plant species, but most fall between 5.5–6.5 .
| Plant type | Recommended pH |
|---|---|
| Leafy vegetables (lettuce, spinach) | 5.5 – 6.5 |
| Tomatoes, peppers | 5.8 – 6.3 |
| Strawberries | 5.5 – 6.5 |
| Herbs (basil, mint) | 5.5 – 6.5 |
If the pH deviates from the recommended range, plants will not be able to absorb important nutrients such as nitrogen, phosphorus or potassium.
What is EC and why is it important?
EC (electrical conductivity) measures the concentration of dissolved salts in a nutrient solution. The higher the EC, the more nutrients are present. EC is measured in mS/cm (millisiemens per centimeter) .
Optimal EC values for hydroponics
Each plant requires a different concentration of nutrients. Here are the recommended EC values:
| Plant type | Recommended EC (mS/cm) |
|---|---|
| Salad, spinach | 0.8 – 1.2 |
| Tomatoes, peppers | 2.0 – 3.5 |
| Strawberries | 1.2 – 1.8 |
| Herbs (basil, mint) | 1.0 – 1.6 |
If the EC is too low , plants are not getting enough nutrients. If it is too high , overfertilization can occur, which can damage the root system.
How to correctly measure pH and EC with the Combo Pen P110 Pro
The Combo Pen P110 Pro is a reliable tool that allows you to easily measure pH, EC and temperature of the nutrient solution.
1. Preparing the measuring pen
- Make sure the electrode is clean and dry .
- Turn on the pen by pressing the button.
- If you are using the pen for the first time, it is recommended to calibrate it (see instructions).
2. pH measurement
- Immerse the Combo Pen P110 Pro into the nutrient solution sample.
- Wait a few seconds for the value to stabilize.
- Read the measured value on the display.
- If the pH is outside the ideal range, use a pH+ or pH- solution to adjust it.
3. EC measurement
- Switch the pen to EC mode using the button.
- Immerse the electrode in the solution and wait for the value to stabilize.
- If the EC is too low, add nutrients. If it is too high, dilute the solution with water.
4. Temperature measurement
Water temperature affects both EC and pH. The ideal temperature of the nutrient solution should be between 18–22 °C , as higher temperatures decrease the dissolved oxygen in the water, which can negatively affect plant growth.
How to properly maintain the Combo Pen P110 Pro?
🛠️ For long life and measurement accuracy, follow these rules:
✔ Rinse the electrode with distilled water after each measurement.
✔ Do not store the pen in water – the electrodes are designed for dry storage.
✔ Calibrate the instrument regularly using pH 4.0 and pH 7.0 calibration solutions.
✔ If the electrode wears out, it can be easily replaced .
Summary: Key factors for successful hydroponic growing
✅ pH: Keep it between 5.5–6.5 so that plants can properly absorb nutrients.
✅ EC: Monitor values according to plant type and adjust fertilization.
✅ Water temperature: Keep between 18–22 °C so that the plants have enough oxygen.
✅ Regular Check: Use the Combo Pen P110 Pro for precise measurements and solution adjustments.
By correctly measuring and regulating pH and EC, you will provide your plants with optimal growing conditions and achieve higher yields and healthier plants . 🌿🌱
🔎 Do you always want to have accurate pH and EC values? Get the Combo Pen P110 Pro and keep your nutrient solution under control!