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
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
Bonide Insecticide Bacillus Thuricide BT Concentrate 1 pint 500 milliliter 1/ each
Bonide Insecticide Bacillus Thuricide BT Concentrate 1 pint 500 milliliter 1/ each
Bonide Insecticide Bacillus Thuricide BT Concentrate 1 pint 500 milliliter 1/ each
SKU 207011
SRP⠀ 26.88
− 5.52
21.36
﹟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
﹟organic
The Amazing Doctor Zymes Enzymatic Cleaner Professional Eliminator and Insecticide Super Concentrate, size: 1 quart 1 liter 1/ each
The Amazing Doctor Zymes Enzymatic Cleaner Professional Eliminator and Insecticide Super Concentrate
The Amazing Doctor Zymes Enzymatic Cleaner Professional Eliminator and Insecticide Super Concentrate
SKU 239511239511
SRP⠀ 57.11
− 10.57
46.54
﹟organic
BioSafe Systems ZeroTol 2.0 Fungicide, Bactericide, Algaecide, size: 2.5 gallon 10 liter 1/ each
BioSafe Systems ZeroTol 2.0 Fungicide, Bactericide, Algaecide
BioSafe Systems ZeroTol 2.0 Fungicide, Bactericide, Algaecide
SKU 206481206481
SRP⠀ 172.67
− 19.50
153.17
﹟organic
BioSafe Systems SaniDate 5.0 Sanitizer/ Disinfectant, size: 2.5 gallon 10 liter 1/ each
BioSafe Systems SaniDate 5.0 Sanitizer/ Disinfectant
BioSafe Systems SaniDate 5.0 Sanitizer/ Disinfectant
SKU 206701206701
SRP⠀ 152.97
− 19.50
133.47
﹟organic
BioSafe Systems Azaguard Insecticide/Nematicide, size: 1 quart 1 liter 1/ each
BioSafe Systems Azaguard Insecticide/Nematicide
BioSafe Systems Azaguard Insecticide/Nematicide
SKU 238741238741
SRP⠀ 459.91
− 98.50
361.41
GardenTech Sevin Insect Killer Zeta-Cypermethrin Concentrate 1 pint 500 milliliter 16 fluid ounce 6/ case
GardenTech Sevin Insect Killer Zeta-Cypermethrin Concentrate 1 pint 500 milliliter 16 fluid ounce 6/ case
GardenTech Sevin Insect Killer Zeta-Cypermethrin Concentrate 1 pint 500 milliliter 16 fluid ounce 6/ case
SKU 250171
SRP⠀ 85.74
− 1.29
84.45
﹟fave
Pyur Isopropyl Alcohol 99.9%, size: 1 gallon 4 liter 1/ each
Pyur Isopropyl Alcohol 99.9%
Pyur Isopropyl Alcohol 99.9%
SKU 212081212081
SRP⠀ 52.35
− 8.12
44.23
﹟fave
Central Coast Garden Products Green Cleaner Miticide and Fungicide, size: 4 fluid ounce 125 milliliter 1/ each
Central Coast Garden Products Green Cleaner Miticide and Fungicide
Central Coast Garden Products Green Cleaner Miticide and Fungicide
SKU 207681207681
SRP⠀ 31.59
− 5.85
25.74
BioSafe Systems Oxidate 5.0 Fungicide, size: 2.5 gallon 10 liter 1/ each
BioSafe Systems Oxidate 5.0 Fungicide
BioSafe Systems Oxidate 5.0 Fungicide
SKU 216071216071
SRP⠀ 149.22
− 16.50
132.72
Bonide Systemic Insecticide Insect Control II Concentrate 1 pint 500 milliliter 1/ each
Bonide Systemic Insecticide Insect Control II Concentrate 1 pint 500 milliliter 1/ each
Bonide Systemic Insecticide Insect Control II Concentrate 1 pint 500 milliliter 1/ each
SKU 206991
SRP⠀ 29.70
− 6.09
23.61
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
Mad Farmer pH Kit with 8 oz Get Down, 8 oz Get Up, 1 oz Indicator 1 pint 500 milliliter 1/ each
Mad Farmer pH Kit with 8 oz Get Down, 8 oz Get Up, 1 oz Indicator 1 pint 500 milliliter 1/ each
Mad Farmer pH Kit with 8 oz Get Down, 8 oz Get Up, 1 oz Indicator 1 pint 500 milliliter 1/ each
SKU 204621
SRP⠀ 23.76
− 4.40
19.36
Marrone Bio Innovations Stargus Biofungicide 2.5 gallon 1/ each
Marrone Bio Innovations Stargus Biofungicide 2.5 gallon 1/ each
Marrone Bio Innovations Stargus Biofungicide 2.5 gallon 1/ each
SKU 243241
SRP⠀ 353.01
− 51.50
301.51
﹟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
﹟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
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
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
﹟fave
FoxFarm Don't Bug Me Spray Pyrethrin, Ready to Use 1.5 pint 700 milliliter 24 fluid ounce 1/ each
FoxFarm Don't Bug Me Spray Pyrethrin, Ready to Use 1.5 pint 700 milliliter 24 fluid ounce 1/ each
FoxFarm Don't Bug Me Spray Pyrethrin, Ready to Use 1.5 pint 700 milliliter 24 fluid ounce 1/ each
SKU 203711
SRP⠀ 26.65
− 6.80
19.85
Atticus Ascertain Insecticide Total Release TR Aerosol Fogger Can 2 fluid ounce 60 milliliter 1/ each
Atticus Ascertain Insecticide Total Release TR Aerosol Fogger Can 2 fluid ounce 60 milliliter 1/ each
Atticus Ascertain Insecticide Total Release TR Aerosol Fogger Can 2 fluid ounce 60 milliliter 1/ each
SKU 239111
SRP⠀ 39.63
− 6.94
32.69
Doktor Doom Formula 420 Crop & Plant Rescue Concentrate 3 in 1 Makes 50 quarts 1 quart 1 liter 1/ each
Doktor Doom Formula 420 Crop & Plant Rescue Concentrate 3 in 1 Makes 50 quarts 1 quart 1 liter 1/ each
Doktor Doom Formula 420 Crop & Plant Rescue Concentrate 3 in 1 Makes 50 quarts 1 quart 1 liter 1/ each
SKU 240171
SRP⠀ 59.39
− 9.80
49.59
﹟fave
Hanna Instruments Cal-Check Solution, size: 0.68 fluid ounce 20 milliliter 1 sachet
Hanna Instruments Cal-Check Solution
Hanna Instruments Cal-Check Solution
SKU 211411211411
SRP⠀ 2.75
− 0.60
2.15
Bonide Captain Jack's Deadbug Insecticide Spinosad Concentrate, size: 1 pint 500 milliliter 1/ each
Bonide Captain Jack's Deadbug Insecticide Spinosad Concentrate
Bonide Captain Jack's Deadbug Insecticide Spinosad Concentrate
SKU 206971206971
SRP⠀ 38.23
− 7.46
30.77
﹟fave
Dyna-Gro Neem Oil, size: 8 fluid ounce 250 milliliter 1/ each
Dyna-Gro Neem Oil
Dyna-Gro Neem Oil
SKU 206881206881
SRP⠀ 31.17
− 5.77
25.40
﹟organic﹟fave
Safer Insect Killing Soap Concentrate 1 pint 500 milliliter 1/ each
Safer Insect Killing Soap Concentrate 1 pint 500 milliliter 1/ each
Safer Insect Killing Soap Concentrate 1 pint 500 milliliter 1/ each
SKU 207371
SRP⠀ 27.76
− 5.42
22.34
Annihilation Pesticide Concentrate, size: 4 fluid ounce 125 milliliter makes 1-4 gallons 1/ each
Annihilation Pesticide Concentrate
Annihilation Pesticide Concentrate
SKU 239681239681
SRP⠀ 38.57
− 7.14
31.43
﹟fave
Bluelab Calibration Solution pH 4, size: 8 fluid ounce 250 milliliter 1/ each
Bluelab Calibration Solution pH 4
Bluelab Calibration Solution pH 4
SKU 203511203511
SRP⠀ 18.39
− 3.59
14.80
﹟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
﹟organic
SuffOil-X Insecticide/ Miticide/ Fungicide 2.5 gallon 10 liter 1/ each
SuffOil-X Insecticide/ Miticide/ Fungicide 2.5 gallon 10 liter 1/ each
SuffOil-X Insecticide/ Miticide/ Fungicide 2.5 gallon 10 liter 1/ each
SKU 239391
SRP⠀ 122.25
− 16.50
105.75
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
Display prices in: USD
bottom of page