Swimming pool and hot tub maintenance

500+ products

Electronic pH Tester, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter with 0.01 Resolution, for Drinking Water, Aquarium, Spas (1/5)

Electronic pH Tester, 5-in-1 Pool Water Tester with Backlight, pH/TDS/EC/Salinity/Temperature with ATC, High Precision pH Meter with 0.01 Resolution, for Drinking Water, Aquarium, Spas

~~£47.84~~

Free shipping

5-in-1-pH-Meter with Salzgehalt, Temperatur, TDS, EC, high-performance Multifunction Tester, Wasserdicht, automatische Temperaturkompensation, Selbstkalibrierung, digital pH-Tester (1/4)

5-in-1-pH-Meter with Salzgehalt, Temperatur, TDS, EC, high-performance Multifunction Tester, Wasserdicht, automatische Temperaturkompensation, Selbstkalibrierung, digital pH-Tester

~~£56.99~~

Free shipping

Pool-Salzgehalt-Tester, Salzwasser-pH- und Salzgehalt-Messgerät, digitaler 5-in-1-Pool-pH- und Salzgehalt-Tester, Salzgehalt-Messgerät für Pool, Whirlpool und Spa (1/4)

Pool-Salzgehalt-Tester, Salzwasser-pH- und Salzgehalt-Messgerät, digitaler 5-in-1-Pool-pH- und Salzgehalt-Tester, Salzgehalt-Messgerät für Pool, Whirlpool und Spa

~~£56.99~~

Free shipping

Digital water quality tester TDS, LCD display, measuring interval 0-9990 ppm, reading accuracy of 2%, portable (1/4)

Digital water quality tester TDS, LCD display, measuring interval 0-9990 ppm, reading accuracy of 2%, portable (2/4)

Digital water quality tester TDS, LCD display, measuring interval 0-9990 ppm, reading accuracy of 2%, portable

~~£57.99~~

Free shipping

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction (1/4)

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction (2/4)

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction

~~£55.14~~

Free shipping

Salinity Tester for Salt Water, Pool Salt Tester, Multifunction Water Quality Tester with Backlight for Seawater, AquariumsC-100 Saltwater Pool Test Kit 5 E (1/4)

Salinity Tester for Salt Water, Pool Salt Tester, Multifunction Water Quality Tester with Backlight for Seawater, AquariumsC-100 Saltwater Pool Test Kit 5 E

~~£55.13~~

Free shipping

5 in 1 Swimming Pool Tester pH TDS EC Salinity Temperature Backlit Screen for Drinking Water Aquarium (1/4)

5 in 1 Swimming Pool Tester pH TDS EC Salinity Temperature Backlit Screen for Drinking Water Aquarium (2/4)

5 in 1 Swimming Pool Tester pH TDS EC Salinity Temperature Backlit Screen for Drinking Water Aquarium

~~£54.75~~

Free shipping

Eosnow Professional 3-in-1 Multi-Parameter Portable Pen-Type Water Quality Tester PHE CE TEMP METER ACIDOMETER (1/5)

Eosnow Professional 3-in-1 Multi-Parameter Portable Pen-Type Water Quality Tester PHE CE TEMP METER ACIDOMETER (2/5)

Eosnow Professional 3-in-1 Multi-Parameter Portable Pen-Type Water Quality Tester PHE CE TEMP METER ACIDOMETER (3/5)

Eosnow Professional 3-in-1 Multi-Parameter Portable Pen-Type Water Quality Tester PHE CE TEMP METER ACIDOMETER

~~£56.27~~

Free shipping

Multifunctional digital pH and chlorine controller PC-102B CL2 with LCD screen for swimming pools and spas. Water calibration analyzer with probe. (1/4)

Multifunctional digital pH and chlorine controller PC-102B CL2 with LCD screen for swimming pools and spas. Water calibration analyzer with probe.

~~£62.99~~

Free shipping

Digital pH-Messgerät, Wasserqualitäts-Teststift, Chlorpegelmessgerät, tragbarer Restchlortester, Wasserqualitätserkennungsmessgerät für Schwimmbäder, Spas, Testwerkzeug (1/4)

Digital pH-Messgerät, Wasserqualitäts-Teststift, Chlorpegelmessgerät, tragbarer Restchlortester, Wasserqualitätserkennungsmessgerät für Schwimmbäder, Spas, Testwerkzeug

~~£63.99~~

Free shipping

Salzgehaltmessgerät Digitaler Tester mit LCD-Display Test für Brackwasser-Salzwasser-Marinetank-Test Präzisionsmessung (1/4)

Salzgehaltmessgerät Digitaler Tester mit LCD-Display Test für Brackwasser-Salzwasser-Marinetank-Test Präzisionsmessung (2/4)

Salzgehaltmessgerät Digitaler Tester mit LCD-Display Test für Brackwasser-Salzwasser-Marinetank-Test Präzisionsmessung

~~£62.99~~

Free shipping

5-in-1 Digital Water Tester – Measures pH, TDS, EC, Salinity, Temperature – IP67 Waterproof for Pools, Aquariums, Hydroponics – WATER 5 IN (1/5)

5-in-1 Digital Water Tester – Measures pH, TDS, EC, Salinity, Temperature – IP67 Waterproof for Pools, Aquariums, Hydroponics – WATER 5 IN (2/5)

5-in-1 Digital Water Tester – Measures pH, TDS, EC, Salinity, Temperature – IP67 Waterproof for Pools, Aquariums, Hydroponics – WATER 5 IN (3/5)

5-in-1 Digital Water Tester – Measures pH, TDS, EC, Salinity, Temperature – IP67 Waterproof for Pools, Aquariums, Hydroponics – WATER 5 IN

~~£62.64~~

Free shipping

5-in-1 Digital Water Tester – Measures pH, TDS, EC, Salinity, Temperature – IP67 Waterproof for Pools, Aquariums, Hydroponics – WATER 5 IN

~~£62.64~~

Free shipping

7 in 1 Ph Tester High Precision Measuring Temperature Salinity TDS EC ORP Waterproof Automatic Multifunction Pen (1/4)

7 in 1 Ph Tester High Precision Measuring Temperature Salinity TDS EC ORP Waterproof Automatic Multifunction Pen (2/4)

7 in 1 Ph Tester High Precision Measuring Temperature Salinity TDS EC ORP Waterproof Automatic Multifunction Pen

~~£57.99~~

Free shipping

Water Quality Analyzer Swimming Pool Spa pH Chlorine Cl2 Tester with Professional Probe (1/4)

Water Quality Analyzer Swimming Pool Spa pH Chlorine Cl2 Tester with Professional Probe (2/4)

Water Quality Analyzer Swimming Pool Spa pH Chlorine Cl2 Tester with Professional Probe

~~£57.99~~

Free shipping

Water Quality Tester, 7 in 1 Water Quality Meter ORP PH TDS Temp EC Salinity SG 7 in 1 Precise Digital Water Test Pen with Powder, Digital Water Quality Tester pour me (1/5)

Water Quality Tester, 7 in 1 Water Quality Meter ORP PH TDS Temp EC Salinity SG 7 in 1 Precise Digital Water Test Pen with Powder, Digital Water Quality Tester pour me

~~£57.99~~

Free shipping

Digital Water Tester, Water Quality Test Pen pH TDS EC Temp Portable Sensitive for Swimming Pool and Drinking Water (Blue) (1/4)

Digital Water Tester, Water Quality Test Pen pH TDS EC Temp Portable Sensitive for Swimming Pool and Drinking Water (Blue) (2/4)

Digital Water Tester, Water Quality Test Pen pH TDS EC Temp Portable Sensitive for Swimming Pool and Drinking Water (Blue)

ORP Redox Tester 1 Point Calibration Measurement Aquariums Swimming Pools Water Treatment Aquaculture Spas (1/4)

ORP Redox Tester 1 Point Calibration Measurement Aquariums Swimming Pools Water Treatment Aquaculture Spas (2/4)

ORP Redox Tester 1 Point Calibration Measurement Aquariums Swimming Pools Water Treatment Aquaculture Spas

~~£75.99~~

Free shipping

Water Electrolysis Tester, Portable Water Quality Tester, Lightweight Water Impurity Monitor, Electrolysis Tester (1/4)

Water Electrolysis Tester, Portable Water Quality Tester, Lightweight Water Impurity Monitor, Electrolysis Tester (2/4)

Water Electrolysis Tester, Portable Water Quality Tester, Lightweight Water Impurity Monitor, Electrolysis Tester

~~£69.99~~

Free shipping

Wasserqualitättester, tragbarer digitaler Monitor, PH-Wassertester, Chloranalyse, Schwimmbad-Testkit (weiß) (1/4)

Wasserqualitättester, tragbarer digitaler Monitor, PH-Wassertester, Chloranalyse, Schwimmbad-Testkit (weiß) (2/4)

Wasserqualitättester, tragbarer digitaler Monitor, PH-Wassertester, Chloranalyse, Schwimmbad-Testkit (weiß)

~~£69.99~~

Free shipping

7-in-1 Bluetooth Electronic pH Meter Tester – 0.01 Accuracy – Automatic Calibration – Backlit for Drinking Water, Aquarium, Swimming Pool - cision0 (1/5)

7-in-1 Bluetooth Electronic pH Meter Tester – 0.01 Accuracy – Automatic Calibration – Backlit for Drinking Water, Aquarium, Swimming Pool - cision0 (2/5)

7-in-1 Bluetooth Electronic pH Meter Tester – 0.01 Accuracy – Automatic Calibration – Backlit for Drinking Water, Aquarium, Swimming Pool - cision0 (3/5)

7-in-1 Bluetooth Electronic pH Meter Tester – 0.01 Accuracy – Automatic Calibration – Backlit for Drinking Water, Aquarium, Swimming Pool - cision0

~~£73.94~~

Free shipping

Chemical Chlorine Dispenser System for Hot Tub Spa Replacement P05345 P03821 (1/4)

Chemical Chlorine Dispenser System for Hot Tub Spa Replacement P05345 P03821 (2/4)

Chemical Chlorine Dispenser System for Hot Tub Spa Replacement P05345 P03821

~~£39.07~~

Free shipping

Wasserqualitätsanalysator, digital Chlor- und pH-Cl2-Tester für Schwimmbäder, Thermalwasserqualitätsanalysator mit Probe für Heimpools oder Spas, 1 AA-Alkalibatterie (1.5 V) (nicht im Lieferumfang e (1/4)

Wasserqualitätsanalysator, digital Chlor- und pH-Cl2-Tester für Schwimmbäder, Thermalwasserqualitätsanalysator mit Probe für Heimpools oder Spas, 1 AA-Alkalibatterie (1.5 V) (nicht im Lieferumfang e

~~£63.99~~

Free shipping

14 in 1 Drinking Water Test Kit - Test Kit for Drinking Water, Pools and Spas for Hardness, pH, Lead, Iron, Copper, Chlorine, Fluoride and More (100 Count) (1/5)

14 in 1 Drinking Water Test Kit - Test Kit for Drinking Water, Pools and Spas for Hardness, pH, Lead, Iron, Copper, Chlorine, Fluoride and More (100 Count) (2/5)

14 in 1 Drinking Water Test Kit - Test Kit for Drinking Water, Pools and Spas for Hardness, pH, Lead, Iron, Copper, Chlorine, Fluoride and More (100 Count) (3/5)

14 in 1 Drinking Water Test Kit - Test Kit for Drinking Water, Pools and Spas for Hardness, pH, Lead, Iron, Copper, Chlorine, Fluoride and More (100 Count)

~~£55.74~~

Free shipping

Wasserqualitätstest, digitaler PH-Chlortester, Schwimmbadwasseranalyse (ohne Batterie) (1/4)

Wasserqualitätstest, digitaler PH-Chlortester, Schwimmbadwasseranalyse (ohne Batterie) (2/4)

Wasserqualitätstest, digitaler PH-Chlortester, Schwimmbadwasseranalyse (ohne Batterie)

~~£47.99~~

Free shipping

PH Automatischer Chlortester PH-Meter Digitaler Wasseranalysator Speziell für Schwimmbad-Spa-Aquarien (1/4)

PH Automatischer Chlortester PH-Meter Digitaler Wasseranalysator Speziell für Schwimmbad-Spa-Aquarien (2/4)

PH Automatischer Chlortester PH-Meter Digitaler Wasseranalysator Speziell für Schwimmbad-Spa-Aquarien

~~£47.99~~

Free shipping

Electronic pH Tester, 5-in-1 Pool Water Quality Tester with Backlight, PH/TDS/EC/Salinity/Temperature with ATC, 0.01 Resolution for Drinking Water, Aquarium, Spa (1/4)

Electronic pH Tester, 5-in-1 Pool Water Quality Tester with Backlight, PH/TDS/EC/Salinity/Temperature with ATC, 0.01 Resolution for Drinking Water, Aquarium, Spa

~~£46.99~~

Free shipping

5-in-1 High Precision Salt Water Salinity Tester, IP67 Waterproof Test Kit (1/4)

5-in-1 High Precision Salt Water Salinity Tester, IP67 Waterproof Test Kit (2/4)

5-in-1 High Precision Salt Water Salinity Tester, IP67 Waterproof Test Kit

~~£46.99~~

Free shipping

Portable pH Meter, Experimental Analyzer for Acidometer Industry, Household Drinking Water Quality Analysis (1/4)

Portable pH Meter, Experimental Analyzer for Acidometer Industry, Household Drinking Water Quality Analysis (2/4)

Portable pH Meter, Experimental Analyzer for Acidometer Industry, Household Drinking Water Quality Analysis

~~£48.99~~

Free shipping

8-in-1 Electronic pH Tester for Pools, Spas, Aquariums, Drinking Water and Hydroponics: Measures pH, TDS, Salt, Specific Gravity, ORP, Electrical Conductivity, Temperature and Hydrogen (1/4)

8-in-1 Electronic pH Tester for Pools, Spas, Aquariums, Drinking Water and Hydroponics: Measures pH, TDS, Salt, Specific Gravity, ORP, Electrical Conductivity, Temperature and Hydrogen

~~£47.44~~

Free shipping

Swimming Pool Salinity Tester Salt Water pH and Salinity Meter Digital 5 in 1 Swimming Pool pH and Salinity Tester Salinity Meter for Swimming Pool, Hot Tub and Swim Spa (1/4)

Swimming Pool Salinity Tester Salt Water pH and Salinity Meter Digital 5 in 1 Swimming Pool pH and Salinity Tester Salinity Meter for Swimming Pool, Hot Tub and Swim Spa

~~£51.01~~

Free shipping

Water Quality Tester Portable Digital Water Quality Tester Orp Tester Pen Water Quality Analyzer for Alcohol Pools Aquarium Water Quality Tester (1/5)

Water Quality Tester Portable Digital Water Quality Tester Orp Tester Pen Water Quality Analyzer for Alcohol Pools Aquarium Water Quality Tester

~~£44.94~~

Free shipping

5-in-1 Multifunction Water Tester, digital TDS/EC/Salzgehalt/PH/Temperaturmessgerät für Trinkwasser, Pool, Aquarium, Fishtank und Hydroculture (1/4)

5-in-1 Multifunction Water Tester, digital TDS/EC/Salzgehalt/PH/Temperaturmessgerät für Trinkwasser, Pool, Aquarium, Fishtank und Hydroculture

~~£67.99~~

Free shipping

Pool-pH-Tester, electronic pH-Meter for Hydroculture, Auflösung 0.01, high performance Leitfähigkeitsmessgerät für Aquarien, EC- und pH-ppm-Tester für Aquarium, Spa, Trinkwasser, Poolwasser (1/4)

Pool-pH-Tester, electronic pH-Meter for Hydroculture, Auflösung 0.01, high performance Leitfähigkeitsmessgerät für Aquarien, EC- und pH-ppm-Tester für Aquarium, Spa, Trinkwasser, Poolwasser

~~£67.99~~

Free shipping

5-in-1-Digital-pH-Meter, electronic Water-pH-Tester with LCD-Anzeige – misst pH, ORP, HA2, TEMP, for Schwimmbecken, Aquarien, Hydroculture und Spa (1/4)

5-in-1-Digital-pH-Meter, electronic Water-pH-Tester with LCD-Anzeige – misst pH, ORP, HA2, TEMP, for Schwimmbecken, Aquarien, Hydroculture und Spa (2/4)

5-in-1-Digital-pH-Meter, electronic Water-pH-Tester with LCD-Anzeige – misst pH, ORP, HA2, TEMP, for Schwimmbecken, Aquarien, Hydroculture und Spa

~~£68.99~~

Free shipping

14 in 1 drinking water supply kit, water quality supply for pozo and grifo water, 50/100 pieces - 50 pieces (1/4)

14 in 1 drinking water supply kit, water quality supply for pozo and grifo water, 50/100 pieces - 50 pieces (2/4)

14 in 1 drinking water supply kit, water quality supply for pozo and grifo water, 50/100 pieces - 50 pieces

~~£71.99~~

Free shipping

~~£68.99~~

Free shipping

Water analyzer 10 parameters PH/TDS/temperature JQ006 (1/4)

Water analyzer 10 parameters PH/TDS/temperature JQ006 (2/4)

Water analyzer 10 parameters PH/TDS/temperature JQ006

~~£70.99~~

Free shipping

pH meter, solid structure, energy-efficient, simple to use, numerous outdoor applications (1/5)

pH meter, solid structure, energy-efficient, simple to use, numerous outdoor applications (2/5)

pH meter, solid structure, energy-efficient, simple to use, numerous outdoor applications (3/5)

pH meter, solid structure, energy-efficient, simple to use, numerous outdoor applications

~~£58.19~~

Free shipping

4-in-1 Water Quality Tester, High Precision, Clear Reading, Digital Green Backlight for Temperature, pH, TDS, and EC Testing (1/5)

4-in-1 Water Quality Tester, High Precision, Clear Reading, Digital Green Backlight for Temperature, pH, TDS, and EC Testing (2/5)

4-in-1 Water Quality Tester, High Precision, Clear Reading, Digital Green Backlight for Temperature, pH, TDS, and EC Testing (3/5)

4-in-1 Water Quality Tester, High Precision, Clear Reading, Digital Green Backlight for Temperature, pH, TDS, and EC Testing

~~£60.67~~

Free shipping

phe 5-in-1 Water Tester Multifunctional Water Quality Tester, TDS/EC/Salinity/pH/Digital Temperature for Drinking Water, Swimming Pool, Aquarium, Fish Tank, Hydroponics (1/5)

phe 5-in-1 Water Tester Multifunctional Water Quality Tester, TDS/EC/Salinity/pH/Digital Temperature for Drinking Water, Swimming Pool, Aquarium, Fish Tank, Hydroponics

~~£68.78~~

Free shipping

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction (1/5)

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction (2/5)

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction (3/5)

Intelligent Water Quality Tester EC TDS Salt SG Temperature Conductivity Accurate Multifunction

~~£67.34~~

Free shipping

Digital pH Meter 5 in 1 Electronic pH Tester for Water with LCD Display – Measures pH, ORP, HA2, TEMP, For Swimming Pool, Aquarium, Hydroponics and Spa (1/4)

Digital pH Meter 5 in 1 Electronic pH Tester for Water with LCD Display – Measures pH, ORP, HA2, TEMP, For Swimming Pool, Aquarium, Hydroponics and Spa (2/4)

Digital pH Meter 5 in 1 Electronic pH Tester for Water with LCD Display – Measures pH, ORP, HA2, TEMP, For Swimming Pool, Aquarium, Hydroponics and Spa

~~£64.94~~

Free shipping

2 in 1 pH and Cl2 Tester, Pool Spa Water Quality Level Tester, MUMU Water Quality Monitor (1/4)

2 in 1 pH and Cl2 Tester, Pool Spa Water Quality Level Tester, MUMU Water Quality Monitor (2/4)

2 in 1 pH and Cl2 Tester, Pool Spa Water Quality Level Tester, MUMU Water Quality Monitor (3/4)

2 in 1 pH and Cl2 Tester, Pool Spa Water Quality Level Tester, MUMU Water Quality Monitor

~~£27.59~~

Pool pH Probe, Salinometer for Pool Water, 5 in 1 TDS/EC/Salt Meter/Thermometer/PH Water Quality Tester, Digital Water Quality Monitor, Pool Water Quality Tester (1/5)

Pool pH Probe, Salinometer for Pool Water, 5 in 1 TDS/EC/Salt Meter/Thermometer/PH Water Quality Tester, Digital Water Quality Monitor, Pool Water Quality Tester

~~£51.99~~

Free shipping

Pool pH Probe, Salinometer for Pool Water, 5 in 1 TDS/EC/Salt Meter/Thermometer/PH Water Quality Tester, Digital Water Quality Monitor, Pool Water Quality Tester

~~£51.99~~

Free shipping

PH Tester Meter 5 in 1 Water Quality Swimming Pool Aquarium Hydroponics TDS EC ORP Temperature (1/4)

PH Tester Meter 5 in 1 Water Quality Swimming Pool Aquarium Hydroponics TDS EC ORP Temperature (2/4)

PH Tester Meter 5 in 1 Water Quality Swimming Pool Aquarium Hydroponics TDS EC ORP Temperature

~~£51.99~~

Free shipping

Salinity Tester 0-199.9 Ppt Swimming Pool Salt Tester Swimming Pool Salt Meter Digital Pen Type Swimming Pool Salinity Tester for Seawater/Salt Water Salinity Testing (1/4)

Salinity Tester 0-199.9 Ppt Swimming Pool Salt Tester Swimming Pool Salt Meter Digital Pen Type Swimming Pool Salinity Tester for Seawater/Salt Water Salinity Testing

~~£51.99~~

Free shipping

Swimming Pool Salinity Tester Digital Pen 0-199.9 PPT Measuring Seawater and Saltwater (1/4)

Swimming Pool Salinity Tester Digital Pen 0-199.9 PPT Measuring Seawater and Saltwater (2/4)

Swimming Pool Salinity Tester Digital Pen 0-199.9 PPT Measuring Seawater and Saltwater

~~£51.99~~

Free shipping

pH tester, LCD digital water quality meter for aquariums and swimming pools (EU plug 220V) (1/4)

pH tester, LCD digital water quality meter for aquariums and swimming pools (EU plug 220V) (2/4)

pH tester, LCD digital water quality meter for aquariums and swimming pools (EU plug 220V)

~~£51.99~~

Free shipping

5 in 1 Electronic pH Tester for Swimming Pool with Backlight High Precision (1/4)

5 in 1 Electronic pH Tester for Swimming Pool with Backlight High Precision (2/4)

5 in 1 Electronic pH Tester for Swimming Pool with Backlight High Precision

~~£52.68~~

Free shipping

5-in-1 pH/TDS/EC/SALT/Temperature Water Quality Tester with Green Backlit LCD for Swimming Pool/Aquarium/Pond (1/5)

5-in-1 pH/TDS/EC/SALT/Temperature Water Quality Tester with Green Backlit LCD for Swimming Pool/Aquarium/Pond (2/5)

5-in-1 pH/TDS/EC/SALT/Temperature Water Quality Tester with Green Backlit LCD for Swimming Pool/Aquarium/Pond (3/5)

5-in-1 pH/TDS/EC/SALT/Temperature Water Quality Tester with Green Backlit LCD for Swimming Pool/Aquarium/Pond

~~£50.64~~

Free shipping

Chlorine Tablets (4 in 1) 5kg (20g Each) (1/5)

Chlorine Tablets (4 in 1) 5kg (20g Each) (2/5)

Chlorine Tablets (4 in 1) 5kg (20g Each) (3/5)

Chlorine Tablets (4 in 1) 5kg (20g Each) (4/5)

Chlorine Tablets (4 in 1) 5kg (20g Each)

Free shipping

Pr Salinity Tester 0-199.9 Ppt Swimming Pool Salt Tester Swimming Pool Salt Meter Digital Pen Type Swimming Pool Salinity Tester for Seawater/Salt Water Salinity Testing (1/4)

Pr Salinity Tester 0-199.9 Ppt Swimming Pool Salt Tester Swimming Pool Salt Meter Digital Pen Type Swimming Pool Salinity Tester for Seawater/Salt Water Salinity Testing

~~£51.79~~

Free shipping