Meters & Solutions
Showing 17–26 of 26 results
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GroStar pH calibration kit (pH 4/7/10, 8 oz. each)
$28.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
GroStar pH Probe Maintanence Kit
$23.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
HM Digital 1000 ppm TDS Calibration Solution, 3 oz (90 ml)
$10.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester
$52.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
SOLD OUT 
HM Digital Hydromaster Replacement EC/TDS Probe
$57.99 -
HM Digital PH-80 pH/Temperature Meter
$47.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
HM Digital PH-STOR pH Electrode Storage Solution
$8.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
HM Digital TDS-3 Handheld TDS meter
$36.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
Microbe Life Hydroponics pH DOWN, 1 qt
$19.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026 -
Microbe Life Hydroponics pH UP, 1 qt
$19.99Estimated delivery dates: Aug 30, 2026 - Sep 4, 2026
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