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 $116.93 per unit Bluelab Original Truncheon Meter $116.93 per unit GrowersHouse $65.56 per unit Hanna pH Checker Complete Starter Kit with 4 + 7 Calibration Solution $65.56 per unit GrowersHouse $61.25 per unit Bluelab Replacement pH Probe $61.25 per unit GrowersHouse $59.97 per unit HM Digital Waterproof Combo Meter COM-100 $59.97 per unit GrowersHouse $46.64 per unit Hanna PHEP Tester (Model HI 98107) $46.64 per unit GrowersHouse $26.16 per unit Milwaukee pH Tester Model pH600 AQ $26.16 per unit GrowersHouse $21.43 per unit Bluelab Meter Carry Case $21.43 per unit GrowersHouse $20.99 per unit Bluelab Probe Care Kit pH + Conductivity $20.99 per unit GrowersHouse $18.20 per unit Hanna 1500PPM Calibration Solution $18.20 per unit GrowersHouse $18.20 per unit Hanna 1413 uS-CM Calibration Solution -- 16 oz $18.20 per unit GrowersHouse $18.01 per unit General Hydroponics Calibration pH 7.01 Calibration Solution -- 1 Quart $18.01 per unit GrowersHouse $17.07 per unit Hanna pH7 Calibration Solutions -- 16 oz $17.07 per unit GrowersHouse $16.88 per unit Hanna TDS 1382 Calibration 460 ml $16.88 per unit GrowersHouse $7.27 per unit pH Test Indicator Solution 1 oz $7.27 per unit GrowersHouse $7.21 per unit BlueLab Calibration Solution - 7.0 pH $7.21 per unit GrowersHouse $6.34 per unit General Hydroponics Calibration pH 7.01 Calibration Solution -- 8 oz $6.34 per unit GrowersHouse ← Previous 1 2 3 4 5 6 7 Next →