This is the ultimate digital meter special! This offer includes everything you need for accurate nutrient solutions and fast growing plants. PH is essential for the plant's uptake of nutrients. Nutrient solutions are far more effective with an accurate pH. Most plants like the pH near 5.8 for optimal growth. As nutrient solution is recycled in you hydroponic, the pH can change. This is especially true for rockwool media. The dissolved nutrient in your reservoir can be measured using the Total Dissolved Solids (TDS) meter. It is also known as a Parts Per Million (PPM) and Electrical Conductivity (EC) meter, depending upon the mode you use. This meter gives you an idea of how concentrated your nutrients are. With an accurate measure with these two meters you can optimize your hydroponic garden. Included with this combo offer is 4.0 and 7.0 calibration solution and 1500 PPM calibration.

Combo Includes:

• HM Waterproof pH Pro Meter
• HM Waterproof TDS/EC Pro Meter
• 7.0 pH Calibration Solution 8 ounce
• 4.0 pH Calibration Solution 8 ounce
• 1500 PPM Calibration Solution 8 ounce