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16
Bluelab Conductivity Standard Solution | 120ml - 2.77EC
In Stock: 72
$16.32 $21.37 -24%
GroStar pH calibration kit (pH 4/7, 8 oz. each)
In Stock: 90
$15.95 $18.99 -16%
Luster Leaf Rapitest Digital Soil pH Meter | Results From 3.5 - 9.0
In Stock: 540
$15.64 $21.29 -27%
Milwaukee Instruments pH 4.01 Calibration Solution, 230 ml
In Stock: 109
$13.21 $13.90 -5%
Milwaukee Instruments pH 7.01 Solution, 230 ml
In Stock: 269
$13.21 $13.90 -5%
SUNPACK 2-Function Plant Sensor Meter | 2-Function - Measures Soil Moisture & pH
In Stock: 30
$12.64 $15.79 -20%
SUNPACK Tri-Meter Moisture, Light & pH | Measures Moisture, Light & pH
In Stock: 40
$12.60 $16.99 -26%
GroStar EC Calibration Kit (2.77 EC, 8 oz. each)
In Stock: 133
$12.59 $14.99 -16%
Bluelab Conductivity Standard Solution | 250ml - 2.77 EC - Designed for Bluelab Products
In Stock: 193
$12.29 $15.63 -21%
Bluelab pH 4.0 Calibration Solution | 250ml - Designed for Bluelab Products
In Stock: 145
$11.84 $15.63 -24%
Bluelab pH 7.0 Calibration Solutions | 250ml - Designed for Bluelab Products
In Stock: 197
$11.84 $15.63 -24%
Hydrofarm Active Air 3-Way Meter
In Stock: 51
$10.86 $14.99 -28%
Active Air 2-Way pH & Moisture Meter | 1ct
In Stock: 13
$9.81 $13.99 -30%
HM Digital 1000 ppm TDS Calibration Solution, 3 oz (90 ml)
In Stock: 100
$9.36 $9.49 -1%
Hort2O Digital Hygro-Thermometer | 9.8ft Temperature Sensor - Digital Display - Measures Temperatures 32°F to 122°F - Measures Humidity 20% to 98%
In Stock: 138
$8.85 $19.99 -56%
Active Air 3-Way Meter
In Stock: 820
$8.75 $13.09 -33%
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