pH and EC

EC, or electrical conductivity, measures how much dissolved material is in the nutrient solution. Higher EC means a stronger solution. A TDS meter gives a related reading and is also common. What EC Does Not Tell You EC shows overall strength, not which nutrients are...

Most hydroponic crops grow well in a slightly acidic range, often cited as about 5.5 to 6.5. The right number depends on the plant, so check the requirements for the crop you are growing. Why It Matters pH controls how well plants can take up each nutrient. A solution...