Collection: Calibration & Reference Solutions
Shop our selection of calibration and reference solutions to help keep your PH and EC/PPM/TDS meters calibrated and reading accurately.
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Bluelab 4.0 pH Calibration Solution
Regular price From $1.80 USDRegular priceUnit price / per$1.80 USDSale price From $1.80 USD -
Bluelab 7.0 pH Calibration Solution
Regular price From $1.80 USDRegular priceUnit price / per$1.80 USDSale price From $1.80 USD -
Bluelab pH Probe KCl Storage Solution
Regular price From $13.00 USDRegular priceUnit price / per$14.83 USDSale price From $13.00 USDSale -
General Hydroponics pH Control Kit
Regular price $15.00 USDRegular priceUnit price / per$22.98 USDSale price $15.00 USDSale -
General Hydroponics PRO pH
Regular price From $76.00 USDRegular priceUnit price / per$124.86 USDSale price From $76.00 USDSale -
Front Row Ag Clean Up
Regular price $60.00 USDRegular priceUnit price / per$96.00 USDSale price $60.00 USDSale -
General Hydroponics pH Up Liquid
Regular price From $8.47 USDRegular priceUnit price / per$9.72 USDSale price From $8.47 USDSale -
Bluelab Probe Care Kit - pH
Regular price $21.00 USDRegular priceUnit price / per$24.00 USDSale price $21.00 USDSale -
Hanna GroLine Quick Calibration Solution
Regular price From $3.00 USDRegular priceUnit price / per$3.00 USDSale price From $3.00 USD -
Apera GroStar pH Probe Maintenance Kit
Regular price $17.00 USDRegular priceUnit price / per$23.99 USDSale price $17.00 USDSale -
Apera GroStar EC Calibration Kit 2.77EC
Regular price $11.00 USDRegular priceUnit price / per$14.99 USDSale price $11.00 USDSale -
HM Digital 1000 ppm TDS Calibration Solution 3 oz
Regular price $9.49 USDRegular priceUnit price / per$9.49 USDSale price $9.49 USD -
Bluelab Nutrient Probe Care Kit Conductivity
Regular price $15.00 USDRegular priceUnit price / per$17.00 USDSale price $15.00 USDSale -
General Hydroponics pH Down Liquid
Regular price From $8.47 USDRegular priceUnit price / per$9.72 USDSale price From $8.47 USDSale -
Microbe Life Hydroponics pH UP
Regular price $14.39 USDRegular priceUnit price / per$18.99 USDSale price $14.39 USDSale -
Microbe Life Hydroponics pH DOWN
Regular price $14.39 USDRegular priceUnit price / per$18.99 USDSale price $14.39 USDSale -
House & Garden pH + Osmosis Stabilizer
Regular price $596.00 USDRegular priceUnit price / per$1,012.20 USDSale price $596.00 USDSale -
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Chemboys pH Up Max
Regular price $43.00 USDRegular priceUnit price / per$60.99 USDSale price $43.00 USDSale -
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Chemboys pH Down Max
Regular price $43.00 USDRegular priceUnit price / per$60.99 USDSale price $43.00 USDSale -
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Athena Pro Balance
Regular price From $77.00 USDRegular priceUnit price / per$110.00 USDSale price From $77.00 USDSale -
Hanna GroLine pH 7.01 Solution
Regular price From $3.00 USDRegular priceUnit price / per$3.00 USDSale price From $3.00 USD -
Hanna GroLine pH 4.01 Solution
Regular price From $3.00 USDRegular priceUnit price / per$3.00 USDSale price From $3.00 USD -
Hanna GroLine Storage Solution
Regular price From $20.00 USDRegular priceUnit price / per$20.00 USDSale price From $20.00 USD -
Hanna GroLine Electrode Cleaning Solution
Regular price From $20.00 USDRegular priceUnit price / per$20.00 USDSale price From $20.00 USD