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

Save £1,478.70
Palintest Potalab
Palintest
Palintest Potalab Sale price£8,379.30 Regular price£9,858.00
Palintest DPD No 1 Rapid Dissolve Strip of 10 TabletsPalintest DPD No 1 Rapid Dissolve Strip of 10 Tablets
Palintest
Palintest DPD No 1 Rapid Dissolve Strip of 10 Tablets Sale price£2.01
J-QUANT Nitrate/Nitrite 25-500 Test StripsJ-QUANT Nitrate/Nitrite 25-500 Test Strips
Johnson Analytica
J-QUANT Nitrate/Nitrite 25-500 Test Strips Sale price£43.88
Lovibond Sodium Chloride Calibration Solution (NACL)Lovibond Sodium Chloride Calibration Solution (NACL)
Lovibond
Lovibond Sodium Chloride Calibration Solution (NACL) Sale price£34.90
Save £3.76
Lovibond Total Alkalinity Checkit Disc 20-240mg/l
Lovibond
Lovibond Total Alkalinity Checkit Disc 20-240mg/l Sale price£25.16 Regular price£28.92
Save £5.73
Lovibond Sulphide No.1 Tablets BottleLovibond Sulphide No.1 Tablets Bottle
Lovibond
Lovibond Sulphide No.1 Tablets Bottle Sale price£38.35 Regular price£44.08
Save £3.08
Lovibond Phosphate No.2 L.R.TabletsLovibond Phosphate No.2 L.R.Tablets
Lovibond
Lovibond Phosphate No.2 L.R.Tablets Sale price£20.58 Regular price£23.66
Save £9.47
Lovibond CHECKIT COMPARATOR Bromine KitLovibond CHECKIT COMPARATOR Bromine Kit
Lovibond
Lovibond CHECKIT COMPARATOR Bromine Kit Sale price£63.41 Regular price£72.88
Lovibond Checkit® Comparator Iron LRLovibond Checkit® Comparator Iron LR
Lovibond
Lovibond Checkit® Comparator Iron LR Sale price£63.41
Save £0.73
Hanna Instruments-713-25 Reagents for Hanna Instruments-713 Phosphate Pocket Checker x 25 testsHanna Instruments-713-25 Reagents for Hanna Instruments-713 Phosphate Pocket Checker x 25 tests
Hanna Instruments
Hanna Instruments-713-25 Reagents for Hanna Instruments-713 Phosphate Pocket Checker x 25 tests Sale price£13.87 Regular price£14.60
Save £1.88
Hanna Instruments ORP test solution, 470mV, 500 mL bottleHanna Instruments ORP test solution, 470mV, 500 mL bottle
Hanna Instruments
Hanna Instruments ORP test solution, 470mV, 500 mL bottle Sale price£35.72 Regular price£37.60
DTK H/TH4/CH3 - Hardness HR Titrant
DTK-TAW
DTK H/TH4/CH3 - Hardness HR Titrant Sale price£10.72
EC1 - Conductivity/TDS/Temp Meter c/w 1413 SolutionEC1 - Conductivity/TDS/Temp Meter c/w 1413 Solution
DTK-TAW
EC1 - Conductivity/TDS/Temp Meter c/w 1413 Solution Sale price£141.52
Kuntze GDX 350µm Bowl &Filter 1/4"& Female c/w 1/4" Hex Nipple
Kuntze Instruments
Kuntze GDX 350µm Bowl &Filter 1/4"& Female c/w 1/4" Hex Nipple Sale price£61.68
PoolLab 2.0 Phosphate No.2 HR Photometer TabletsPoolLab 2.0 Phosphate No.2 HR Photometer Tablets
WATER-I.D.
PoolLab 2.0 Phosphate No.2 HR Photometer Tablets Sale priceFrom £5.95
PoolLab Phosphate LR No.1 Photometer Powder Pillows
WATER-I.D.
PoolLab Phosphate LR No.1 Photometer Powder Pillows Sale priceFrom £17.25
IDEXX Pseudalert for 100ml Sample
IDEXX
IDEXX Pseudalert for 100ml Sample Sale priceFrom £237.00
Save £4.33
Palintest Bromine / pH / Total Alkalinity PooltesterPalintest Bromine / pH / Total Alkalinity Pooltester
Palintest
Palintest Bromine / pH / Total Alkalinity Pooltester Sale price£24.57 Regular price£28.90
Save £16.95
Palintest Lumiso Pooltest Expert Check StandardsPalintest Lumiso Pooltest Expert Check Standards
Palintest
Palintest Lumiso Pooltest Expert Check Standards Sale price£96.05 Regular price£113.00
Save £115.35
Palintest Lumiso AmmoniaPalintest Lumiso Ammonia
Palintest
Palintest Lumiso Ammonia Sale price£653.65 Regular price£769.00
Spa pH PlusSpa pH Plus
TEST ALL WATER
Spa pH Plus Sale price£5.64
Test All Water Spa Non Chlorine ShockTest All Water Spa Non Chlorine Shock
TEST ALL WATER
Test All Water Spa Non Chlorine Shock Sale priceFrom £12.74
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Spa Mulitifunctional 20g Chlorine Tablets 1kgSpa Mulitifunctional 20g Chlorine Tablets 1kg
TEST ALL WATER
Spa Mulitifunctional 20g Chlorine Tablets 1kg Sale price£9.52
pH Indicator Strips pH 7.0 - 14.0pH Indicator Strips pH 7.0 - 14.0
Johnson Analytica
pH Indicator Strips pH 7.0 - 14.0 Sale price£3.84

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