Hanna HI721-25 Iron Checker Reagents - 25 Tests for HI721 Colorimeter 09421024920890 7 Factor (700 Scale): 1 swimming pool pH meter EC TDS to 2 405002

7 Factor (700 Scale): 1 ppm ≈ 1

413 µS/cm conductivity standard that is prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis

WINE PH METER KIT

Premium Coconut Shell GAC: Highest-grade acid-washed coconut shell activated carbon — not the cheaper bituminous (coal-based) carbon used by competing brands

150-gallon capacity: Filters up to 150 gallons before replacement

Hanna HI721 25 Iron Checker Reagents 25 Tests for HI721 Colorimeter 09421024920890 7 Factor (700 Scale): 1 swimming pool pH meter EC TDS to 2 405002 7 Factor (700 Scale): 1 ppm ≈ 1 413 µS cm conductivity standard that is prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis