Filter All listing types All listing types Sell Auction Service Controllers & meters All categories Genetics Seeds Pollen Clones Tissue Cultures Spores Equipment Complete kits Ventilation / Climate Lights Propagation Irrigation system Tents & greenhouses Nutrients Soil & Media Pots & trays Controllers & meters Harvesting & processing Testing Packaging & conditioning Mycology supplies Accessories, tools, consumables Services Breeding Compliance Design & Construction Extraction Harvesting Propagation Price Min: Max: Condition New Refurbished Used Update view All categories Genetics Equipment Complete kits Ventilation / Climate Lights Propagation Irrigation system Tents & greenhouses Nutrients Soil & Media Pots & trays Controllers & meters Harvesting & processing Testing Packaging & conditioning Mycology supplies Accessories, tools, consumables Services Bluelab Original Truncheon Meter $116.93 / unit GrowersHouse Hanna pH Checker Complete Starter Kit with 4 + 7 Calibration Solution $65.56 / unit GrowersHouse Bluelab Replacement pH Probe $61.25 / unit GrowersHouse HM Digital Waterproof Combo Meter COM-100 $59.97 / unit GrowersHouse Hanna PHEP Tester (Model HI 98107) $46.64 / unit GrowersHouse Milwaukee pH Tester Model pH600 AQ $26.16 / unit GrowersHouse Bluelab Meter Carry Case $21.43 / unit GrowersHouse Bluelab Probe Care Kit pH + Conductivity $20.99 / unit GrowersHouse Hanna 1500PPM Calibration Solution $18.20 / unit GrowersHouse Hanna 1413 uS-CM Calibration Solution -- 16 oz $18.20 / unit GrowersHouse General Hydroponics Calibration pH 7.01 Calibration Solution -- 1 Quart $18.01 / unit GrowersHouse Hanna pH7 Calibration Solutions -- 16 oz $17.07 / unit GrowersHouse Hanna TDS 1382 Calibration 460 ml $16.88 / unit GrowersHouse pH Test Indicator Solution 1 oz $7.27 / unit GrowersHouse BlueLab Calibration Solution - 7.0 pH $7.21 / unit GrowersHouse General Hydroponics Calibration pH 7.01 Calibration Solution -- 8 oz $6.34 / unit GrowersHouse ← Previous 1 2 3 4 5 6 7 Next →