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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6008 products

Save £38.97
Lovibond AF112A Free, Combined & Total Chlorine Kit
Lovibond
Lovibond AF112A Free, Combined & Total Chlorine Kit Sale price£260.78 Regular price£299.75
LaMotte Insta-Test Copper Test StripsLaMotte Insta-Test Copper Test Strips
LaMotte
LaMotte Insta-Test Copper Test Strips Sale price£17.20
On sale
Lovibond Hydrogen Peroxide L.R.TabletsLovibond Hydrogen Peroxide L.R.Tablets
Lovibond
Lovibond Hydrogen Peroxide L.R.Tablets Sale priceFrom £25.84 Regular price£29.70
Save £3.59
Hanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HCHanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC
Hanna Instruments
Hanna Instruments-775 Freshwater Alkalinity Colorimeter - Checker®HC Sale price£68.31 Regular price£71.90
Save £3.15
Hanna Instruments-3846 Chromium VI Test Kit
Hanna Instruments
Hanna Instruments-3846 Chromium VI Test Kit Sale price£59.95 Regular price£63.10
Hanna Instruments-151-02 Checktemp4®folding thermometer, -50.0 to +150.0°C
Hanna Instruments
Hanna Instruments-151-02 Checktemp4®folding thermometer, -50.0 to +150.0°C Sale price£40.32
Save £12.35
Hanna Instruments Pocket EC/TDS and pH Tester, High RangeHanna Instruments Pocket EC/TDS and pH Tester, High Range
Hanna Instruments
Hanna Instruments Pocket EC/TDS and pH Tester, High Range Sale price£234.65 Regular price£247.00
Floating Chlorine Tablet Dispenser - Small
vendor-unknown
Floating Chlorine Tablet Dispenser - Small Sale price£6.70
Floating Chlorine Tablet Dispenser - LargeFloating Chlorine Tablet Dispenser - Large
TEST ALL WATER
Floating Chlorine Tablet Dispenser - Large Sale price£8.50
Eutech EcoTestr Salt
Eutech
Eutech EcoTestr Salt Sale price£74.25
Eutech Waterproof EcoTestr TDS Low with ATC, 1 point CalibrationEutech Waterproof EcoTestr TDS Low with ATC, 1 point Calibration
Eutech
Eutech Waterproof EcoTestr TDS Low with ATC, 1 point Calibration Sale price£64.67
Save £2.20
Lovibond DPD 3 High Calcium Tablets
Lovibond
Lovibond DPD 3 High Calcium Tablets Sale price£14.76 Regular price£16.96
COMPLETE Home Water Quality Test Kit
ITS
COMPLETE Home Water Quality Test Kit Sale price£21.17
On sale
Lovibond Buffer pH 7 TabletsLovibond Buffer pH 7 Tablets
Lovibond
Lovibond Buffer pH 7 Tablets Sale priceFrom £21.09 Regular price£24.24
On sale
Lovibond Buffer Tablets pH4Lovibond Buffer Tablets pH4
Lovibond
Lovibond Buffer Tablets pH4 Sale priceFrom £21.60 Regular price£24.83
Chlorine Indicator Strips (0-1000mg/l) (100 Strips) Test All Water
TEST ALL WATER
Chlorine Indicator Strips (0-1000mg/l) (100 Strips) Test All Water Sale price£8.21
Save £83.22
Lovibond MD50 CODLovibond MD50 COD
Lovibond
Lovibond MD50 COD Sale price£556.94 Regular price£640.16
Milwaukee MI526-25 Powder Reagents for Free Chlorine Photometer
Milwaukee
Milwaukee MI526-25 Powder Reagents for Free Chlorine 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 £18.30
Palintest/Wagtech Membrane Filtres, 0.45um, 47mm, gridded, 200 packPalintest/Wagtech Membrane Filtres, 0.45um, 47mm, gridded, 200 pack
Palintest
Palintest/Wagtech Membrane Filtres, 0.45um, 47mm, gridded, 200 pack Sale price£103.70 Regular price£122.00
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
HACH Iron Reagent Powder Pillows, 0.02-3.00 mg/L Fe
Hach
HACH Iron Reagent Powder Pillows, 0.02-3.00 mg/L Fe Sale price£38.11
Check₂O Pool & Spa 3 in 1 Test StripsCheck₂O Pool & Spa 3 in 1 Test Strips
Johnson Analytica
Check₂O Pool & Spa 3 in 1 Test Strips Sale priceFrom £5.99

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