4 in 1 EC / TDS / / Temp soil tester is suitable for all kinds of soil gardening plants, using high-quality probes, rust and resistance. high or low soil organic carbon content hinder the growth of plants. Different fertilizers produce different soil ECs according to the characteristics of the and the different growth stages. The TDS value indicates contact with total soluble solids in water. The lower the tds value, the solubility of heavy metal ions in water. Nutrient solution is the key to cultivation, and different require different nutrient solution formulas. It can measure well and help you solve this problem., Weight: 0.47840310854 Pounds, Manufacturer: NONDK