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it will not seal to the tray
and basalt rock dust
Adjust pH to proper levels after mixing all fertilizers and additives
Formulated to encourage lush green growth
HANNA GroLine Nutrient EC/TDS Truncheon Tester Fan Speed Controllers it will not seal toHANNA Truncheon EC TDS Tester HI98330 Ideal for hydroponics and agriculture applications, the HI98330 GroLine Nutrient Tester accurately measures the electrical conductivity (EC) in mS cm and the total dissolved solids (TDS) conversion in parts per million (ppm) of the nutrients in water. Suitable for plants that need a higher EC, the tester features an extended range up to 6. 0 mS cm (EC), 3000 ppm (500 ppm scale), and 4200 ppm (700 ppm scale). The
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