top of page
Store / maintenance
General Hydroponics Calibration Solution pH 4.01 8 fluid ounce 250 milliliter 1/ each

General Hydroponics Calibration Solution pH 4.01 8 fluid ounce 250 milliliter 1/ each

SKU 203431
10.74
﹟fave
SRP⠀ 13.86
− 3.12
Bulk pricing available for quantities of 6 units or more
✅ price beat guarantee
1
Buy more, save more
Quantity Price per item Discount
6 items 6.55 39% off
12 items 5.70 47% off
Save this product for later
Share this product with your friends
Pin it
General Hydroponics Calibration Solution pH 4.01 8 fluid ounce 250 milliliter 1/ each
Product Details
UPC: 793094015417
Brand: General Hydroponics
Available stock: 7+

price per unit: liter & gallon

item *bulk qty
203431  *6/ pack *12/ case
🔆
45

.40

171

.84
💧
27

.69

104

.82
🍅
24

.09

91

.20

🌱

General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use our reference solutions widely among many popular brands of meters using the NaCl scale. General Hydroponics technicians check each batch to ensure that our solutions are exactly calibrated each time they are used.

Show More
You May Also Like
﹟organic
Gowan M-pede Insecticide/Miticide/Fungicide 2.5 gallon 10 liter 1/ each
Gowan M-pede Insecticide/Miticide/Fungicide 2.5 gallon 10 liter 1/ each
Gowan M-pede Insecticide/Miticide/Fungicide 2.5 gallon 10 liter 1/ each
SKU 238901
SRP⠀ 189.72
− 26.50
163.22
﹟organic﹟fave
Safer Insect Killing Soap Ready to Use RTU with Trigger Sprayer Bottle 1 quart 1 liter 1/ each
Safer Insect Killing Soap Ready to Use RTU with Trigger Sprayer Bottle 1 quart 1 liter 1/ each
Safer Insect Killing Soap Ready to Use RTU with Trigger Sprayer Bottle 1 quart 1 liter 1/ each
SKU 207361
SRP⠀ 21.25
− 4.15
17.10
﹟organic
General Hydroponics Defguard Biofungicide, Bactericide, size: 1 pint 500 milliliter 1/ each
General Hydroponics Defguard Biofungicide, Bactericide
General Hydroponics Defguard Biofungicide, Bactericide
SKU 207261207261
SRP⠀ 30.24
− 6.81
23.43
﹟organic
Monterey Lawn & Garden B.t. Biological Control Concentrate, size: 1 quart 1/ each
Monterey Lawn & Garden B.t. Biological Control Concentrate
Monterey Lawn & Garden B.t. Biological Control Concentrate
SKU 243211243211
SRP⠀ 44.46
− 8.67
35.79
﹟fave
CYCO Buffer pH Down, size: 8 fluid ounce 250 milliliter 1/ each
CYCO Buffer pH Down
CYCO Buffer pH Down
SKU 200731200731
SRP⠀ 11.51
− 3.40
8.11
Cutting Edge Solutions pH Up Buffer, size: 1 quart 12/ case
Cutting Edge Solutions pH Up Buffer
Cutting Edge Solutions pH Up Buffer
SKU 244031244041
SRP⠀ 183.69
− 29.50
154.19
Pyur 710 Ethanol w/ Heptane 200 Proof, size: 55 gallon 208 liter 1/ each
Pyur 710 Ethanol w/ Heptane 200 Proof
Pyur 710 Ethanol w/ Heptane 200 Proof
SKU 200081200081
SRP⠀ 1 050.28
− 122.50
927.78
﹟organic
Marrone Bio Innovations Regalia CG BioFungicide Biological Organic Fungus Control Reynoutria sachalinensis 5%, size: 1 quart 1 liter 1/ each
Marrone Bio Innovations Regalia CG BioFungicide Biological Organic Fungus Control Reynoutria sachalinensis 5%
Marrone Bio Innovations Regalia CG BioFungicide Biological Organic Fungus Control Reynoutria sachalinensis 5%
SKU 208051208051
SRP⠀ 110.53
− 16.50
94.03
NPK Industries Power Wash Gravity Spray, size: 12 fluid ounce 360 milliliter with Ultra Fine Mist Sprayer Bottle 1/ each
NPK Industries Power Wash Gravity Spray
NPK Industries Power Wash Gravity Spray
SKU 241191241191
SRP⠀ 21.74
− 4.24
17.50
﹟fave
Bluelab Storage Solution pH Probes, size: 4 fluid ounce 125 milliliter 1/ each
Bluelab Storage Solution pH Probes
Bluelab Storage Solution pH Probes
SKU 203591203591
SRP⠀ 25.37
− 4.95
20.42
﹟fave
Bluelab Calibration Solution pH 7, size: 8 fluid ounce 250 milliliter 1/ each
Bluelab Calibration Solution pH 7
Bluelab Calibration Solution pH 7
SKU 203481203481
SRP⠀ 18.38
− 3.59
14.79
﹟fave
Bluelab pH Down Premium Buffer 1 quart 1 liter 1/ each
Bluelab pH Down Premium Buffer 1 quart 1 liter 1/ each
Bluelab pH Down Premium Buffer 1 quart 1 liter 1/ each
SKU 216631
SRP⠀ 25.33
− 4.94
20.39
﹟organic
MGK Pyganic Specialty 5.0 Concentrate Broad Spectrum Insecticide Organic Multipurpose 5% Pyrethrins from Chrysanthemum Flower Refined Extract, size: 1 quart 1 liter 1/ each
MGK Pyganic Specialty 5.0 Concentrate Broad Spectrum Insecticide Organic Multipurpose 5% Pyrethrins from Chrysanthemum Flower Refined Extract
MGK Pyganic Specialty 5.0 Concentrate Broad Spectrum Insecticide Organic Multipurpose 5% Pyrethrins from Chrysanthemum Flower Refined Extract
SKU 206141206141
SRP⠀ 306.93
− 48.50
258.43
Dominion 2L Pest Control Whitefly, Aphid, Thrip, Gnat 21.40% Imidacloprid 1.5 pint 800 milliliter 1/ each
Dominion 2L Pest Control Whitefly, Aphid, Thrip, Gnat 21.40% Imidacloprid 1.5 pint 800 milliliter 1/ each
Dominion 2L Pest Control Whitefly, Aphid, Thrip, Gnat 21.40% Imidacloprid 1.5 pint 800 milliliter 1/ each
SKU 217191
SRP⠀ 79.51
− 13.92
65.59
Hanna Instruments Calibration Solution pH 10.01, size: 8 fluid ounce 250 milliliter 1/ each
Hanna Instruments Calibration Solution pH 10.01
Hanna Instruments Calibration Solution pH 10.01
SKU 213291213291
SRP⠀ 34.61
− 6.41
28.20
﹟fave
MGK Evergreen 5.0 Concentrate Broad Spectrum Insecticide Organic Multipurpose 5% Pyrethrum from Chrysanthemum Flower Total Extract, size: 1 pint 500 milliliter 1/ each
MGK Evergreen 5.0 Concentrate Broad Spectrum Insecticide Organic Multipurpose 5% Pyrethrum from Chrysanthemum Flower Total Extract
MGK Evergreen 5.0 Concentrate Broad Spectrum Insecticide Organic Multipurpose 5% Pyrethrum from Chrysanthemum Flower Total Extract
SKU 206861206861
SRP⠀ 104.05
− 17.50
86.55
Athena Broad Spectrum Insecticide and Fungicide IPM, size: 1 quart 1 liter 1/ each
Athena Broad Spectrum Insecticide and Fungicide IPM
Athena Broad Spectrum Insecticide and Fungicide IPM
SKU 217771217771
SRP⠀ 87.92
− 15.39
72.53
House & Garden pH Osmosis Stabilizer 15 gallon 60 liter 1/ each
House & Garden pH Osmosis Stabilizer 15 gallon 60 liter 1/ each
House & Garden pH Osmosis Stabilizer 15 gallon 60 liter 1/ each
SKU 209461
SRP⠀ 1 012.20
− 763.50
248.70
﹟fave
Sierra Natural Science SNS 203, size: 4 fluid ounce 125 milliliter 1/ each
Sierra Natural Science SNS 203
Sierra Natural Science SNS 203
SKU 206231206231
SRP⠀ 13.46
− 2.50
10.96
﹟fave
Mad Farmer Oxygenator 34% H2O2, size: 1 gallon 4 liter 1/ each
Mad Farmer Oxygenator 34% H2O2
Mad Farmer Oxygenator 34% H2O2
SKU 204591204591
SRP⠀ 59.40
− 21.09
38.31
BASF Pylon Insecticide & Miticide Chlorfenapyr, size: 1 pint 500 milliliter 1/ each
BASF Pylon Insecticide & Miticide Chlorfenapyr
BASF Pylon Insecticide & Miticide Chlorfenapyr
SKU 217261217261
SRP⠀ 912.86
− 124.50
788.36
Corteva Agriscience Conserve SC Insecticide 1 quart 1 liter 1/ each
Corteva Agriscience Conserve SC Insecticide 1 quart 1 liter 1/ each
Corteva Agriscience Conserve SC Insecticide 1 quart 1 liter 1/ each
SKU 239021
SRP⠀ 281.60
− 44.50
237.10
BioSafe Systems Biofoamer Foaming Agent Additive 5 gallon 20 liter 1/ each
BioSafe Systems Biofoamer Foaming Agent Additive 5 gallon 20 liter 1/ each
BioSafe Systems Biofoamer Foaming Agent Additive 5 gallon 20 liter 1/ each
SKU 238761
SRP⠀ 141.27
− 15.50
125.77
﹟fave
Groline Calibration Solution pH 4.01, size: 0.68 fluid ounce 20 milliliter 1 sachet
Groline Calibration Solution pH 4.01
Groline Calibration Solution pH 4.01
SKU 209021209021
SRP⠀ 2.76
− 0.60
2.16
﹟organic
Garden Essentials Neem Oil Pure Cold-pressed 1 pint 500 milliliter 1/ each
Garden Essentials Neem Oil Pure Cold-pressed 1 pint 500 milliliter 1/ each
Garden Essentials Neem Oil Pure Cold-pressed 1 pint 500 milliliter 1/ each
SKU 206941
SRP⠀ 29.36
− 5.44
23.92
﹟fave
Bluelab 2.77 Calibration Solution Conductivity, size: 8 fluid ounce 250 milliliter 1/ each
Bluelab 2.77 Calibration Solution Conductivity
Bluelab 2.77 Calibration Solution Conductivity
SKU 214101214101
SRP⠀ 18.40
− 3.59
14.81
﹟fave
Advanced Nutrients pH Buffer pH Down, size: 1 quart 1 liter 1/ each
Advanced Nutrients pH Buffer pH Down
Advanced Nutrients pH Buffer pH Down
SKU 202961202961
SRP⠀ 36.01
− 6.67
29.34
Pyur Orange Oil D-Limonene High Purity Food Grade 1 gallon 4 liter 1/ each
Pyur Orange Oil D-Limonene High Purity Food Grade 1 gallon 4 liter 1/ each
Pyur Orange Oil D-Limonene High Purity Food Grade 1 gallon 4 liter 1/ each
SKU 216581
SRP⠀ 141.35
− 20.50
120.85
Floramite Miticide SC/ LS 8 fluid ounce 250 milliliter 1/ each
Floramite Miticide SC/ LS 8 fluid ounce 250 milliliter 1/ each
Floramite Miticide SC/ LS 8 fluid ounce 250 milliliter 1/ each
SKU 211651
SRP⠀ 159.22
− 26.50
132.72
﹟fave
NPK Industries Mighty Wash Miticide
NPK Industries Mighty Wash Miticide
NPK Industries Mighty Wash Miticide
SKU 207851207851
SRP⠀ 25.05
− 5.14
19.91
Display prices in: USD
bottom of page