Best Selling Products

Our Best Selling Products category features the most popular and trusted water testing solutions chosen by professionals and everyday users alike. From quick and easy test kits to advanced meters and reagents, these products have earned their place as customer favourites for their reliability, accuracy, and ease of use. Whether you’re testing pool water, drinking water, or industrial systems, these top picks deliver the dependable results you can count on.

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4195 products

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Lovibond Checkit® Comparator pH UniversalLovibond Checkit® Comparator pH Universal
Lovibond
Lovibond Checkit® Comparator pH Universal Sale price£63.41 Regular price£72.88
Bromine Test Strips [0-5ppm] (50Pk)Bromine Test Strips [0-5ppm] (50Pk)
DTK-TAW
Bromine Test Strips [0-5ppm] (50Pk) Sale price£32.94
Arsenometer® Portable Arsenic Testing Kit Trace2oArsenometer® Portable Arsenic Testing Kit Trace2o
Trace2o
Arsenometer® Portable Arsenic Testing Kit Trace2o Sale price£3,200.00
Baird Parker Agar; Staphylococci.
TEST ALL WATER
Baird Parker Agar; Staphylococci. Sale price£11.56
Save £2.59
Lovibond Alkalinity P 250 BottleLovibond Alkalinity P 250 Bottle
Lovibond
Lovibond Alkalinity P 250 Bottle Sale price£17.31 Regular price£19.90
Sold outSave £2.43
Lovibond Acidifying PT Tablets Foil (250 Tablets) - (Discontinued)Lovibond Acidifying PT Tablets Foil (250 Tablets) - (Discontinued)
Lovibond
Lovibond Acidifying PT Tablets Foil (250 Tablets) - (Discontinued) Sale price£24.72 Regular price£27.15
Universal pH Indicator Strips 0 - 14 Test All WaterUniversal pH Indicator Strips 0 - 14 Test All Water
TEST ALL WATER
Universal pH Indicator Strips 0 - 14 Test All Water Sale price£4.05
Sold outSave £11.91
Hanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC ClearanceHanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC Clearance
Hanna Instruments
Hanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC Clearance Sale price£59.99 Regular price£71.90
Lovibond ACETIC ACID 20% 65ml
Lovibond
Lovibond ACETIC ACID 20% 65ml Sale price£6.86
Hanna Instruments HI-731315 Spare glass cuvettes complete with caps x 2 for Checkers
Hanna Instruments
Hanna Instruments HI-731315 Spare glass cuvettes complete with caps x 2 for Checkers Sale price£10.07
Milwaukee MW803 MAX Waterproof Low Range 4-in-1 pH / EC / TDS/Temp Tester with Replaceable ProbeMilwaukee MW803 MAX Waterproof Low Range 4-in-1 pH / EC / TDS/Temp Tester with Replaceable Probe
Milwaukee
Milwaukee MW803 MAX Waterproof Low Range 4-in-1 pH / EC / TDS/Temp Tester with Replaceable Probe Sale price£217.88
Milwaukee MI528-25 Powder Reagents for Iron Photometer
Milwaukee
Milwaukee MI528-25 Powder Reagents for Iron Photometer Sale price£12.69
Milwaukee MA9015 Storage Solution for pH / ORP Electrodes
Milwaukee
Milwaukee MA9015 Storage Solution for pH / ORP Electrodes Sale price£16.44
Milwaukee MA9007 pH 7.01 Calibration Solution
Milwaukee
Milwaukee MA9007 pH 7.01 Calibration Solution Sale price£16.44
Save £3.53
Lovibond CyA HR-Test Tablets 100 Pack
Lovibond
Lovibond CyA HR-Test Tablets 100 Pack Sale price£23.66 Regular price£27.19
Lamotte Spin Disk Reagent Cartridge Chlorine/Bromine Plus Phosphate 10 Way Disk, 100/bxLamotte Spin Disk Reagent Cartridge Chlorine/Bromine Plus Phosphate 10 Way Disk, 100/bx
LaMotte
Lamotte Spin Disk Reagent Cartridge Chlorine/Bromine Plus Phosphate 10 Way Disk, 100/bx Sale price£250.00
LaMotte Insta Test 4 PlusLaMotte Insta Test 4 Plus
LaMotte
LaMotte Insta Test 4 Plus Sale price£7.06
Water-I.D DPD No.3 Rapid Tablets
WATER-I.D.
Water-I.D DPD No.3 Rapid Tablets Sale priceFrom £5.95
IDEXX Quanti-Cult QC Kit
IDEXX
IDEXX Quanti-Cult QC Kit Sale price£621.00
HACH Intellical PHC101 Laboratory Low Maintenance Gel Filled pH Electrode, 3m Cable
Hach
HACH Intellical PHC101 Laboratory Low Maintenance Gel Filled pH Electrode, 3m Cable Sale price£255.00
PoolLab Combi Pack Hydrogen Peroxide (HR)
WATER-I.D.
PoolLab Combi Pack Hydrogen Peroxide (HR) Sale price£25.23
Kuntze Instruments
Kuntze Cloud Connect Remote Access Annual Subscription Sale price£405.00 Regular price£435.00
Aquarium pH 6.4 - 8.4, 50 strips/pk Test All WaterAquarium pH 6.4 - 8.4, 50 strips/pk Test All Water
TEST ALL WATER
Aquarium pH 6.4 - 8.4, 50 strips/pk Test All Water Sale price£2.52
HACH Ammonia test strips, 0 - 6.0 mg/L, 25 tests
Hach
HACH Ammonia test strips, 0 - 6.0 mg/L, 25 tests Sale price£23.00

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