Resource icon

Pros and Cons of Buying a PH/EC/TDS Combo Meter for Growing Cannabis

Growing cannabis has become increasingly popular in recent years, as more people are looking to cultivate their own plants for personal use or as a form of alternative medicine. To achieve the best results, it's essential to understand the various factors that affect plant growth and health, such as pH, EC (electrical conductivity), and TDS (total dissolved solids) levels. One tool that can help you monitor these factors is a pH/EC/TDS combo meter. In this article, we will discuss the pros and cons of buying a combo meter for growing cannabis.

The Importance of pH, EC, and TDS Levels​

Before diving into the advantages and disadvantages, it is crucial to understand why pH, EC, and TDS levels matter when growing cannabis. Each of these factors plays a vital role in the overall health of your plants, and maintaining the proper balance can significantly impact the quality and yield of your cannabis crop.


The pH level measures the acidity or alkalinity of a solution, and it can greatly affect the nutrient availability for your plants. Cannabis plants typically thrive in a slightly acidic environment, with a pH range of 6.0 to 6.5 for soil and 5.5 to 6.5 for hydroponics systems. An improper pH level can lead to nutrient deficiencies or toxicities, which can result in stunted growth, yellowing leaves, and other health issues.


Electrical conductivity (EC) is a measure of the concentration of dissolved salts in a solution. It is often used as an indicator of nutrient levels in the growing medium. A higher EC level means that there are more nutrients available for your cannabis plants. However, too high or too low EC levels can cause nutrient imbalances, leading to suboptimal growth and potential health problems.


Total dissolved solids (TDS) is a measure of the total amount of all inorganic and organic substances dissolved in a solution. It is another way to assess the nutrient concentration in your growing medium. Like EC, maintaining the proper TDS levels is essential for ensuring optimal growth and avoiding nutrient imbalances.

Pros of Buying a PH/EC/TDS Combo Meter​

Convenience and Accuracy​

A combo meter combines the functions of pH, EC, and TDS meters into a single, compact device. This means you can easily measure all three parameters with just one tool, saving time and effort. Additionally, combo meters typically offer higher accuracy than their individual counterparts, providing more reliable readings.


Investing in a combo meter can be more cost-effective than buying separate meters for pH, EC, and TDS. With a single purchase, you'll have all the necessary tools to monitor your cannabis plants' health, avoiding the need for multiple instruments.

Ease of Use​

Most combo meters are user-friendly, with easy-to-read displays and simple calibration procedures. This makes them accessible to both beginners and experienced growers alike, ensuring that you can accurately measure and adjust pH, EC, and TDS levels as needed.

Cons of Buying a PH/EC/TDS Combo Meter​

Limited Flexibility​

While combo meters offer convenience, they may not provide the same flexibility as individual meters. If one part of the combo meter fails or requires replacement, you may need to replace the entire device, whereas with separate meters, you can replace or repair only the problematic instrument.


Although combo meters can be more cost-effective than buying separate meters, they can still be relatively expensive, especially for high-quality models. This may be an issue for growers on a tight budget who might need to prioritize other aspects of their cannabis cultivation setup.

Potential for Inaccuracy​

While many combo meters are accurate, some lower-quality models may provide less reliable readings than individual meters. Inaccurate readings can lead to improper adjustments, which can negatively impact your cannabis plants' health and yield.

In conclusion, a pH/EC/TDS combo meter can be a valuable tool for monitoring and maintaining the optimal growing conditions for cannabis plants. The convenience, accuracy, and cost-effectiveness of these devices make them an attractive option for many growers. However, it's essential to weigh the potential disadvantages, such as limited flexibility, cost, and potential inaccuracies, before making a decision. Ultimately, the choice will depend on your specific needs, budget, and growing experience.
First release
Last update
0.00 star(s) 0 ratings

More resources from logic

Top Bottom