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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4193 products

PoolLab 1.0 Replacement Cuvette
WATER-I.D.
PoolLab 1.0 Replacement Cuvette Sale price£8.84
TA4 - pH 4.5 Indicator 65mlTA4 - pH 4.5 Indicator 65ml
DTK-TAW
TA4 - pH 4.5 Indicator 65ml Sale price£7.12
Test All Water TA3 - Alkalinity LR TitrantTest All Water TA3 - Alkalinity LR Titrant
DTK-TAW
Test All Water TA3 - Alkalinity LR Titrant Sale priceFrom £10.42
Lovibond Ammonia No 1 & Ammonia No 2 Pack (250)Lovibond Ammonia No 1 & Ammonia No 2 Pack (250)
Lovibond
Lovibond Ammonia No 1 & Ammonia No 2 Pack (250) Sale price£67.06
Lovibond Acidifying GP TabletsLovibond Acidifying GP Tablets
Lovibond
Lovibond Acidifying GP Tablets Sale priceFrom £18.25
Save £19.80
Palintest DPD No 3 LiquidPalintest DPD No 3 Liquid
Palintest
Palintest DPD No 3 Liquid Sale price£112.20 Regular price£132.00
Save £2.38
Lovibond Nitrite No.2 250 BottleLovibond Nitrite No.2 250 Bottle
Lovibond
Lovibond Nitrite No.2 250 Bottle Sale price£15.93 Regular price£18.31
Lovibond DPD 1 Liquid Reagent Solution
Lovibond
Lovibond DPD 1 Liquid Reagent Solution Sale price£22.61
Lovibond AF431 Sulphate KitLovibond AF431 Sulphate Kit
Lovibond
Lovibond AF431 Sulphate Kit Sale price£71.32
Save £76.76
Lovibond MD150 (6 in 1) Chlorine, Bromine, pH, CyA, TA & Calcium Photometer - Tablet ReagentsLovibond MD150 (6 in 1) Chlorine, Bromine, pH, CyA, TA & Calcium Photometer - Tablet Reagents
Lovibond
Lovibond MD150 (6 in 1) Chlorine, Bromine, pH, CyA, TA & Calcium Photometer - Tablet Reagents Sale price£513.67 Regular price£590.43
Save £20.41
Lovibond SD30 EC (Conductivity / TDS / Salt)Lovibond SD30 EC (Conductivity / TDS / Salt)
Lovibond
Lovibond SD30 EC (Conductivity / TDS / Salt) Sale price£135.00 Regular price£155.41
Save £3.66
Palintest Square Plastic Test Tubes 10ml Cell with CapPalintest Square Plastic Test Tubes 10ml Cell with Cap
Palintest
Palintest Square Plastic Test Tubes 10ml Cell with Cap Sale price£20.74 Regular price£24.40
LaMotte Insta-Test Phosphate Test StripsLaMotte Insta-Test Phosphate Test Strips
LaMotte
LaMotte Insta-Test Phosphate Test Strips Sale price£11.50
Save £3.21
Palintest Chlorine/pH PooltesterPalintest Chlorine/pH Pooltester
Palintest
Palintest Chlorine/pH Pooltester Sale price£18.19 Regular price£21.40
Water-I.D Alkatest Rapid 100 TabletsWater-I.D Alkatest Rapid 100 Tablets
WATER-I.D.
Water-I.D Alkatest Rapid 100 Tablets Sale price£14.45
Legionella Microbiological SamplingHow to take a water sample
Test All Water
Legionella Microbiological Sampling Sale priceFrom £46.50
Save £12.55
Palintest Contour Comparator Kit Chlorine (0-5mg/l Cl2)Palintest Contour Comparator Kit Chlorine (0-5mg/l Cl2)
Palintest
Palintest Contour Comparator Kit Chlorine (0-5mg/l Cl2) Sale price£71.15 Regular price£83.70
On sale
Palintest Chemical Oxygen Demand (COD) Tubetests. 50 - 2000 mg/L O2Palintest Chemical Oxygen Demand (COD) Tubetests. 50 - 2000 mg/L O2
Palintest
Palintest Chemical Oxygen Demand (COD) Tubetests. 50 - 2000 mg/L O2 Sale priceFrom £60.86 Regular price£71.60
Lovibond Comparator 2000+ Phenol Red DiscLovibond Comparator 2000+ Phenol Red Disc
Lovibond
Lovibond Comparator 2000+ Phenol Red Disc Sale price£136.26
Palintest Steadichlor 'N.X, 5kgPalintest Steadichlor 'N.X, 5kg
Palintest
Palintest Steadichlor 'N.X, 5kg Sale price£125.00
Save £3.63
Lovibond Vario Chlorine Free DPD 10mlLovibond Vario Chlorine Free DPD 10ml
Lovibond
Lovibond Vario Chlorine Free DPD 10ml Sale price£24.30 Regular price£27.93
IDEXX Colilert-18
IDEXX
IDEXX Colilert-18 Sale priceFrom £192.00
Pro-Swim Hot Tub Instant Filter Cartridge CleanerPro-Swim Hot Tub Instant Filter Cartridge Cleaner
Pro-Swim
Pro-Swim Hot Tub Instant Filter Cartridge Cleaner Sale priceFrom £7.47
Test All Water Spa & Hot Tub Bromine Disinfectant TabletsTest All Water Spa & Hot Tub Bromine Disinfectant Tablets
TEST ALL WATER
Test All Water Spa & Hot Tub Bromine Disinfectant Tablets Sale priceFrom £15.96

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