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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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Athena (1 product)
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CYCO (1 product)
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General Hydroponics (5 products)
GroStar (4 products)
Hanna Instruments (6 products)
HM Digital (2 products)
House & Garden (1 product)
Mad Farmer (2 products)
Nectar for the Gods (2 products)

Athena (1 product)
Bluelab (7 products)
Chemboys (2 products)
Cutting Edge Solutions (1 product)
CYCO (1 product)
Front-Row AG (1 product)
General Hydroponics (5 products)
GroStar (4 products)
Hanna Instruments (6 products)
HM Digital (2 products)
House & Garden (1 product)
Mad Farmer (2 products)
Nectar for the Gods (2 products)

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Meters & Calibration Solutions (32 products)
Plant Nutrients & Supplements (3 products)

Meters & Calibration Solutions (32 products)
Plant Nutrients & Supplements (3 products)

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1 Gallon (8 products)
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Nectar for the Gods (2 products)

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120 ml (1 products)
230 ml (5 products)
250 ml (4 products)
500 ml (8 products)
8 Ounce (1 products)
1 Quart (6 products)
Case (25 x 20 ml Packets) (3 products)
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35 products

HM Digital PH-STOR pH Electrode Storage Solution

Sale

HM Digital PH-STOR pH Electrode Storage Solution

Regular price $8.00 USD

Regular price ~~$8.49 USD~~ Sale price $8.00 USD
Unit price per

Sale
Bluelab 2.77EC Conductivity Solution

Bluelab 2.77EC Conductivity Solution

Regular price From $2.00 USD

Regular price ~~$1.80 USD~~ Sale price From $2.00 USD
Unit price per
Bluelab Probe Care Kit pH & Conductivity

Sale

Bluelab Probe Care Kit pH & Conductivity

Regular price $29.00 USD

Regular price ~~$31.00 USD~~ Sale price $29.00 USD
Unit price per

Sale
Apera GroStar pH Calibration Kit pH 4/7/10

Sale

Apera GroStar pH Calibration Kit pH 4/7/10

Regular price $25.00 USD

Regular price ~~$28.99 USD~~ Sale price $25.00 USD
Unit price per

Sale
Apera GroStar pH Calibration Kit pH 4/7

Sale

Apera GroStar pH Calibration Kit pH 4/7

Regular price $17.00 USD

Regular price ~~$18.99 USD~~ Sale price $17.00 USD
Unit price per

Sale
Mad Farmer Get Down

Mad Farmer Get Down

Regular price From $90.00 USD

Regular price ~~$11.55 USD~~ Sale price From $90.00 USD
Unit price per
Mad Farmer Get Up

Mad Farmer Get Up

Regular price From $90.00 USD

Regular price ~~$11.55 USD~~ Sale price From $90.00 USD
Unit price per
Nectar for the Gods Hades pH Down

Sale

Nectar for the Gods Hades pH Down

Regular price From $17.00 USD

Regular price ~~$22.99 USD~~ Sale price From $17.00 USD
Unit price per

Sale
Nectar for the Gods Olympus Up

Sale

Nectar for the Gods Olympus Up

Regular price From $14.00 USD

Regular price ~~$16.49 USD~~ Sale price From $14.00 USD
Unit price per

Sale
Cutting Edge Solutions pH Up

Cutting Edge Solutions pH Up

Regular price From $122.00 USD

Regular price ~~$13.33 USD~~ Sale price From $122.00 USD
Unit price per
General Hydroponics pH Test Kit

Sale

General Hydroponics pH Test Kit

Regular price $12.00 USD

Regular price ~~$14.68 USD~~ Sale price $12.00 USD
Unit price per

Sale

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