- Bluelab pH Probe KCI Storage Solution / 100 ml
- General Hydroponics pH 4.01 Calibration Solution / 8 Ounce
- General Hydroponics pH 7.01 Calibration Solution / 8 Ounce
- General Hydroponics pH Control Kit
- HM Digital Handheld TDS Tester Model TDS-3
- HM Digital pH Meter Model PH-80
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