The pH of your fertilizer may fluctuate due to a variety of factors, such as the type of fertilizer you are using, the quality of water you are mixing it with, and the temperature of the environment.

One possible reason for pH fluctuations is the chemical composition of the fertilizer. Some fertilizers may have acidic or basic properties that can affect the pH of the solution when mixed with water. Additionally, some fertilizers may react with water to form acidic or basic compounds, which can also affect the pH.

Another factor that can influence pH fluctuations is the quality of water you are using. If the water you are using has a high or low pH, it can affect the overall pH of the fertilizer solution. This is because water with a high pH (alkaline) can neutralize acidic compounds in the fertilizer, while water with a low pH (acidic) can make the solution more acidic.

Temperature can also play a role in pH fluctuations. If the fertilizer solution gets too hot or too cold, it can cause changes in pH due to chemical reactions or solubility changes.

To prevent pH fluctuations, it's important to monitor the pH of your fertilizer solution regularly and make adjustments as needed. You can use pH testing strips or a pH meter to check the pH of the solution and adjust it by adding acidic or basic compounds, such as vinegar or baking soda, respectively. It's also important to use high-quality water and mix the fertilizer solution at a consistent temperature to minimize pH changes.

The EC (electrical conductivity) of your fertilizer solution may fluctuate due to a number of factors, such as changes in the concentration of fertilizer, changes in the water quality, changes in the temperature of the solution, and changes in the pH of the solution.One possible reason for EC fluctuations is the concentration of the fertilizer in the solution. If you add too much or too little fertilizer to the water, it can cause the EC to fluctuate.

This is because the concentration of fertilizer in the water affects its ability to conduct electricity, which is what the EC measures. As the concentration of fertilizer increases, the EC also increases. Water quality can also play a role in EC fluctuations.

If the water you are using has a high mineral content or is contaminated with other substances, it can affect the EC of the fertilizer solution. For example, hard water with a high mineral content can increase the EC of the solution, while water that is contaminated with other substances can interfere with the accuracy of the EC measurement.

Temperature can also affect EC readings. As the temperature of the solution increases, the EC typically increases as well, since warmer water is better able to conduct electricity. Conversely, colder water will have a lower EC reading.

Finally, changes in the pH of the solution can also cause fluctuations in the EC. This is because the pH of the solution affects the electrical charge of the ions in the fertilizer, which in turn affects their ability to conduct electricity.

To prevent EC fluctuations, it's important to maintain consistent concentrations of fertilizer and water, use high-quality water, mix the solution at a consistent temperature, and monitor the pH of the solution regularly. You can also use an EC meter to measure the EC of the solution and make adjustments as needed.