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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4197 products

Lovibond
Lovibond Chloride LR Titrant CC2 (65ml) Sale price£19.52 Regular price£22.44
Oasis® 67mg Water Purification TabletsOasis® 67mg Water Purification Tablets
Oasis
Oasis® 67mg Water Purification Tablets Sale priceFrom £22.16
Biospot® Detergent Sanitiser TabletsBiospot® Detergent Sanitiser Tablets
Biospot
Biospot® Detergent Sanitiser Tablets Sale priceFrom £10.41
Biospot Effervescent Chlorine TabletsBiospot Effervescent Chlorine Tablets
Biospot
Biospot Effervescent Chlorine Tablets Sale priceFrom £6.92
Biospot Effervescent Chlorine TabletsBiospot Effervescent Chlorine Tablets
Biospot
Biospot Effervescent Chlorine Tablets Sale priceFrom £6.03
Save £0.90
Hanna Instruments HI-716-25 Reagents for HI-716 Bromine Checker
Hanna Instruments
Hanna Instruments HI-716-25 Reagents for HI-716 Bromine Checker Sale price£17.20 Regular price£18.10
Save £0.70
Hanna Instruments HI-723-25 Reagents for HI-723 Chromium HR CheckerHanna Instruments HI-723-25 Reagents for HI-723 Chromium HR Checker
Hanna Instruments
Hanna Instruments HI-723-25 Reagents for HI-723 Chromium HR Checker Sale price£13.40 Regular price£14.10
Save £4.53
Hanna Instruments-98303 Pocket Conductivity TesterHanna Instruments-98303 Pocket Conductivity Tester
Hanna Instruments
Hanna Instruments-98303 Pocket Conductivity Tester Sale price£86.17 Regular price£90.70
HACH Intellical PHC101 Laboratory Low Maintenance Gel Filled pH Electrode, 1m Cable
Hach
HACH Intellical PHC101 Laboratory Low Maintenance Gel Filled pH Electrode, 1m Cable Sale price£265.74
Save £1.46
Hanna Instruments HI-746-25 Iron Low Range Checker Reagents
Hanna Instruments
Hanna Instruments HI-746-25 Iron Low Range Checker Reagents Sale price£27.74 Regular price£29.20
On sale
Hanna Instruments HI-746 Iron Low Range Colorimeter CheckerHanna Instruments HI-746 Iron Low Range Colorimeter Checker
Hanna Instruments
Hanna Instruments HI-746 Iron Low Range Colorimeter Checker Sale priceFrom £64.99 Regular price£84.50
Save £4.51
Hanna Instruments HI-739 Fluoride High Range Colorimeter CheckerHanna Instruments HI-739 Fluoride High Range Colorimeter Checker
Hanna Instruments
Hanna Instruments HI-739 Fluoride High Range Colorimeter Checker Sale price£85.69 Regular price£90.20
Save £2.37
Hanna Instruments HI-705-25 Reagents for HI-705 Silica Low Range CheckerHanna Instruments HI-705-25 Reagents for HI-705 Silica Low Range Checker
Hanna Instruments
Hanna Instruments HI-705-25 Reagents for HI-705 Silica Low Range Checker Sale price£45.13 Regular price£47.50
Save £0.67
Hanna Instruments HI-774-25 Reagents for HI-774 Marine Phosphate ULR Checker
Hanna Instruments
Hanna Instruments HI-774-25 Reagents for HI-774 Marine Phosphate ULR Checker Sale price£12.73 Regular price£13.40
Save £3.75
Hanna Instruments HI-774 Marine Phosphate ULR CheckerHanna Instruments HI-774 Marine Phosphate ULR Checker
Hanna Instruments
Hanna Instruments HI-774 Marine Phosphate ULR Checker Sale price£71.35 Regular price£75.10
Save £4.22
Hanna Instruments Copper High Range Colorimeter Checker HCHanna Instruments Copper High Range Colorimeter Checker HC
Hanna Instruments
Hanna Instruments Copper High Range Colorimeter Checker HC Sale price£80.28 Regular price£84.50
Save £4.22
Hanna Instruments HI-747 Copper Low Range Colorimeter CheckerHanna Instruments HI-747 Copper Low Range Colorimeter Checker
Hanna Instruments
Hanna Instruments HI-747 Copper Low Range Colorimeter Checker Sale price£80.28 Regular price£84.50
Save £0.64
Hanna Instruments HI-718-25 Reagents for HI-718 Iodine CheckerHanna Instruments HI-718-25 Reagents for HI-718 Iodine Checker
Hanna Instruments
Hanna Instruments HI-718-25 Reagents for HI-718 Iodine Checker Sale price£12.16 Regular price£12.80
Save £3.75
Hanna Instruments HI-718 Iodine Handheld Colorimeter Checker
Hanna Instruments
Hanna Instruments HI-718 Iodine Handheld Colorimeter Checker Sale priceFrom £39.99
Save £1.88
Hanna Instruments Reagents for HI-762 Free Chlorine Ultra Low Range Checker
Hanna Instruments
Hanna Instruments Reagents for HI-762 Free Chlorine Ultra Low Range Checker Sale price£35.72 Regular price£37.60
Save £1.27
Hanna Instruments-HI-708-25 Reagents for HI-708 Nitrite High Range Checker
Hanna Instruments
Hanna Instruments-HI-708-25 Reagents for HI-708 Nitrite High Range Checker Sale price£24.13 Regular price£25.40
Lovibond
Lovibond Halon Self Adhesive Sale price£42.07 Regular price£44.28
Trace2o
Pipette tips, 10-100uL Trace2o (pk 1000) Sale price£24.72
Trace2o
Pipette tips, 100-1000uL Trace2o (pk 1000) Sale price£38.11

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