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What is a Good pH/EC/TDS Meter for Growing Cannabis?

Growing cannabis requires proper care and attention to ensure the best possible yields and plant health. One of the most important aspects of cannabis cultivation is maintaining the right pH, EC, and TDS levels. In this article, we will discuss the importance of these measurements and recommend some of the best pH/EC/TDS meters for growing cannabis.

What is pH, EC, and TDS and Why are They Important?​


pH stands for "potential hydrogen" and is a scale used to measure the acidity or alkalinity of a solution. The pH scale ranges from 0 to 14, with 7 being neutral. Cannabis plants thrive in a slightly acidic environment, with a pH range of 5.5 to 6.5. Maintaining the correct pH level is crucial for nutrient absorption and overall plant health.

EC (Electrical Conductivity)​

EC measures the ability of a solution to conduct electricity, which is directly related to the concentration of dissolved salts in the solution. In cannabis cultivation, EC is used to determine the nutrient strength of a solution. Monitoring EC levels helps growers adjust nutrient concentrations for optimal plant growth.

TDS (Total Dissolved Solids)​

TDS is a measure of the total amount of dissolved solids (salts, minerals, and metals) in water. In cannabis cultivation, TDS is another way of measuring nutrient concentration in a solution. Monitoring TDS levels can help growers maintain the ideal nutrient balance for their plants.

Top pH/EC/TDS Meters for Growing Cannabis​

Apera Instruments AI311​

The Apera Instruments AI311 is a high-quality, multiparameter pen-style meter that measures pH, EC, and TDS. It features automatic temperature compensation, a large backlit display, and a replaceable probe. The AI311 is known for its accuracy, reliability, and ease of use, making it a top choice for cannabis growers.

Bluelab Combo Meter​

The Bluelab Combo Meter is a versatile and reliable tool for measuring pH, EC, and TDS. It features a large backlit display, automatic temperature compensation, and replaceable probes. The Combo Meter is also waterproof, ensuring durability and long-lasting performance. Its accuracy and robust design make it a popular choice among cannabis cultivators.

Hanna Instruments HI9813-6​

The Hanna Instruments HI9813-6 is a portable, multiparameter meter designed for hydroponic and soil applications. It measures pH, EC, and TDS, as well as temperature, making it an all-in-one solution for cannabis growers. The meter features a large, easy-to-read display, automatic temperature compensation, and replaceable probes. Its durability and accuracy make it a reliable choice for cannabis cultivation.

How to Choose the Right Meter for Your Needs​

Before purchasing a pH/EC/TDS meter, consider the following factors:

  1. Accuracy: Choose a meter that provides accurate readings to ensure proper nutrient management and plant health.
  2. Ease of Use: Look for a meter with user-friendly features, such as automatic temperature compensation, large displays, and simple calibration procedures.
  3. Durability: Opt for a meter with a robust design and replaceable probes to ensure long-lasting performance.
  4. Price: Consider your budget and choose a meter that offers the best value for your investment.


Maintaining optimal pH, EC, and TDS levels is crucial for successful cannabis cultivation. Investing in a high-quality meter can make a significant difference in plant health and yield. The Apera Instruments AI311, Bluelab Combo Meter, and Hanna Instruments HI9813-6 are all excellent choices for measuring pH, EC, and TDS in cannabis cultivation. By considering factors such as accuracy, ease of use, durability, and price, you can find the perfect meter to meet your needs and ensure a successful cannabis growing experience.
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