$24.95
20 packets of 20 ml pH 4 buffer
20 packets of 20 ml pH 7 buffer
4.0, 7.0
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Water Systems & Filtration
HM Digital TDS 1000 PPM Calibration Solution
GrowMax Water Pro Grow 2000 Filtration System
HM Digital COM-80 Pen Style TDS/EC/Temp Meter
HM Digital TDS 1000 PPM Calibration Solution – 20 Packets Of 20ML
GrowMax Water Carbon Block and Sediment Replacement Filter Pack –10″
Growmax Water Replacement Filters For Mega Grow 1000
HM Digital PH Electrode Storage Solution – 60CC
GrowMax Water Mega Grow 1000 Reverse Osmosis System
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