Shop Aquarium O2 and pH Tester

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$42.00
HM Digital PH-80 Ph Hydrotester
Cannon Water Technology
$42.00
HM Digital PH-80 Ph Hydrotester
Cannon Water Technology
$159.95
HM Digital Ph/TDS/EC/Temperature Digital Water Tester Com-300
Cannon Water Technology
$159.95
HM Digital Ph/TDS/EC/Temperature Digital Water Tester Com-300
Cannon Water Technology
$70.00
Waterproof Ph Meter PH-200
Cannon Water Technology
$70.00
Waterproof Ph Meter PH-200
Cannon Water Technology
$231.99
Extech PH220-C Waterproof Palm Ph Meter With Cabled Electrode
Amazon.com
57
Free shipping
$231.99
Extech PH220-C Waterproof Palm Ph Meter With Cabled Electrode
Amazon.com
$162.00
Horiba Laquatwin Ph Meter (Ph 22)
Agriculture Solutions LLC
$162.00
Horiba Laquatwin Ph Meter (Ph 22)
Agriculture Solutions LLC
$189.99
Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
Amazon.com
Free shipping
$189.99
Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
Amazon.com
$13.29
$15.99
VIVOSUN Digital Ph And TDS Meter Kits, 0.01Ph High Accuracy Pen Type Ph Meter ± 2% Readout Accuracy 3-In-1 TDS EC Temperature Meter For Hydroponics,
Amazon.com
27K+
16% off
$13.29
$15.99
VIVOSUN Digital Ph And TDS Meter Kits, 0.01Ph High Accuracy Pen Type Ph Meter ± 2% Readout Accuracy 3-In-1 TDS EC Temperature Meter For Hydroponics,
Amazon.com
$129.50
APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
Amazon.com
986
Free shipping
$129.50
APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
Amazon.com
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
Free shipping
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
$25.99
ATC Digital PH Monitor - Aquarium Water Quality Testing Kit
Digitalzakka
$25.99
ATC Digital PH Monitor - Aquarium Water Quality Testing Kit
Digitalzakka
$9.99
TAEING 100Pcs Ph Test Strips, Universal Ph 0-14, Testing Ph For Urine Saliva Drinking Water Labs Aquariums Gyms Pools… (100)
Amazon.com
10
$9.99
TAEING 100Pcs Ph Test Strips, Universal Ph 0-14, Testing Ph For Urine Saliva Drinking Water Labs Aquariums Gyms Pools… (100)
Amazon.com
$50.24
$66.00
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
Free shipping
23% off
$50.24
$66.00
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
$78.57
PCE Instruments PCE-PHM 12, Aquarium Ph Meter With Temperature Compensation Up To 50 Deg. C
Selectum
$78.57
PCE Instruments PCE-PHM 12, Aquarium Ph Meter With Temperature Compensation Up To 50 Deg. C
Selectum
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$37.99
Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter And PH Tester For Aquarium And Pool Saltwater Water, 5 in 1 Salinity PH Temp EC And TDS
Amazon.com
Free shipping
$37.99
Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter And PH Tester For Aquarium And Pool Saltwater Water, 5 in 1 Salinity PH Temp EC And TDS
Amazon.com
$31.40
HM Digital PH-80, Hydrotester
Selectum
$31.40
HM Digital PH-80, Hydrotester
Selectum
$35.99
5-In-1 Digital Water Quality Tester High Precision Ph Tds Ec Salinity Temperature Measurement With Led Display Easy To Clean For Fish Tanks And Ponds
LightIntheBox.com
$35.99
5-In-1 Digital Water Quality Tester High Precision Ph Tds Ec Salinity Temperature Measurement With Led Display Easy To Clean For Fish Tanks And Ponds
LightIntheBox.com
$9.99
$11.99
Merydi Aquarium Test Strips,8 Way Aquarium Ammonia Test Strips For Saltwater Freshwater Aquariums,Pond Fish Tanks,150 Aquarium Test Kit-Test Ph,
Amazon.com
16% off
$9.99
$11.99
Merydi Aquarium Test Strips,8 Way Aquarium Ammonia Test Strips For Saltwater Freshwater Aquariums,Pond Fish Tanks,150 Aquarium Test Kit-Test Ph,
Amazon.com
$58.99
Digital PH Meter Tester For Hydroponic, Pool, And Aquarium Water Monitoring
Digitalzakka
$58.99
Digital PH Meter Tester For Hydroponic, Pool, And Aquarium Water Monitoring
Digitalzakka
$201.00
Hach Pocket Pro Ph Tester, Ph Meter For Water Analysis Ph & Temp Testing, Large LCD Screen, Replaceable Batteries, Built-In Diagnostics, 9531000
Amazon.com
39
Free shipping
$201.00
Hach Pocket Pro Ph Tester, Ph Meter For Water Analysis Ph & Temp Testing, Large LCD Screen, Replaceable Batteries, Built-In Diagnostics, 9531000
Amazon.com
$197.99
Digital Aquarium Ph/Orp Controller Ph Tester Orp Redox Meter Output
eBay
$197.99
Digital Aquarium Ph/Orp Controller Ph Tester Orp Redox Meter Output
eBay
$108.99
Digital Aquarium PH Controller - Precise 0.00-14.00PH Meter Monitor
Digitalzakka
$108.99
Digital Aquarium PH Controller - Precise 0.00-14.00PH Meter Monitor
Digitalzakka
$16.99
Digital LCD Aquarium And Pool Water PH Analyzer
Digitalzakka
$16.99
Digital LCD Aquarium And Pool Water PH Analyzer
Digitalzakka
$289.00
TQC Sheen Ph-Meter Ph Tester 10 (Waterproof)
Industrial Physics
$289.00
TQC Sheen Ph-Meter Ph Tester 10 (Waterproof)
Industrial Physics
$218.99
Digital Aquarium Ph/Orp Controller Ph Tester Orp Redox Meter Output
eBay
$218.99
Digital Aquarium Ph/Orp Controller Ph Tester Orp Redox Meter Output
eBay
$121.47
Aquarium Water Quality Detector Tds&Ph Monitor Fish Tank Ph Tester
eBay
$121.47
Aquarium Water Quality Detector Tds&Ph Monitor Fish Tank Ph Tester
eBay
$18.99
Portable Waterproof Digital PH Meter For Lab, Drinking Water, And Aquarium
Digitalzakka
$18.99
Portable Waterproof Digital PH Meter For Lab, Drinking Water, And Aquarium
Digitalzakka
$265.54
Smart Aquarium Monitor All In One Ph/Orp/Salt/S.G/Tds/Ec/Temp 24H
eBay
Free shipping
$265.54
Smart Aquarium Monitor All In One Ph/Orp/Salt/S.G/Tds/Ec/Temp 24H
eBay
$77.87
Multi Parameter Water Quality Tester S.G PH EC Salt ORP TDS CF Temp 8 in 1 Rechargeable Online Monitoring For Aquarium US Plug 110V
Walmart
Free shipping
$77.87
Multi Parameter Water Quality Tester S.G PH EC Salt ORP TDS CF Temp 8 in 1 Rechargeable Online Monitoring For Aquarium US Plug 110V
Walmart
$392.70
Testo 206 Compact Ph Tester For Liquids Starter Kit, Ph1
Globaltestsupply.com
$392.70
Testo 206 Compact Ph Tester For Liquids Starter Kit, Ph1
Globaltestsupply.com
$59.99
$168.00
PHS-3C PH Meter 2 in 1 PH Temp Tester Automatic Calibration 0-14 PH 0-100°C Range LED Display Laboratory Aquarium Pool
USA.Banggood
Free shipping
64% off
$59.99
$168.00
PHS-3C PH Meter 2 in 1 PH Temp Tester Automatic Calibration 0-14 PH 0-100°C Range LED Display Laboratory Aquarium Pool
USA.Banggood
$32.99
Multifunction Water Quality Meter For Aquariums - 10 in 1 PH EC TDS ORP Temperature Tester
Evalm
$32.99
Multifunction Water Quality Meter For Aquariums - 10 in 1 PH EC TDS ORP Temperature Tester
Evalm
$9.97
Obosoe Digital Ph Meter,Water Quality Tester,Water Ph Tester With 0-14Ph Measurement Range,Suitable For Drinking Water,Hydroponics, Aquarium,Swimming
Walmart
Free shipping
$9.97
Obosoe Digital Ph Meter,Water Quality Tester,Water Ph Tester With 0-14Ph Measurement Range,Suitable For Drinking Water,Hydroponics, Aquarium,Swimming
Walmart
$124.01
Aquachek Pocket Pro Ph Tester 9531000E
Pool Supply Unlimited
3
$124.01
Aquachek Pocket Pro Ph Tester 9531000E
Pool Supply Unlimited
$59.99
$168.00
PHS-3C PH Meter 2 in 1 PH Temp Tester Automatic Calibration 0-14 PH 0-100°C Range LED Display Laboratory Aquarium Pool
Banggood
Free shipping
64% off
$59.99
$168.00
PHS-3C PH Meter 2 in 1 PH Temp Tester Automatic Calibration 0-14 PH 0-100°C Range LED Display Laboratory Aquarium Pool
Banggood
$18.69
5-In-1 Water Quality Tester For PH, TDS, EC, Temperature - Ideal For Aquariums, Aquaculture, And Drinking Water
Evalm
$18.69
5-In-1 Water Quality Tester For PH, TDS, EC, Temperature - Ideal For Aquariums, Aquaculture, And Drinking Water
Evalm
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Shop Aquarium O2 and pH Tester

Sponsored
About our ads
$42.00
HM Digital PH-80 Ph Hydrotester
Cannon Water Technology
$42.00
HM Digital PH-80 Ph Hydrotester
Cannon Water Technology
$159.95
HM Digital Ph/TDS/EC/Temperature Digital Water Tester Com-300
Cannon Water Technology
$159.95
HM Digital Ph/TDS/EC/Temperature Digital Water Tester Com-300
Cannon Water Technology
$70.00
Waterproof Ph Meter PH-200
Cannon Water Technology
$70.00
Waterproof Ph Meter PH-200
Cannon Water Technology
$231.99
Extech PH220-C Waterproof Palm Ph Meter With Cabled Electrode
Amazon.com
57
Free shipping
$231.99
Extech PH220-C Waterproof Palm Ph Meter With Cabled Electrode
Amazon.com
$162.00
Horiba Laquatwin Ph Meter (Ph 22)
Agriculture Solutions LLC
$162.00
Horiba Laquatwin Ph Meter (Ph 22)
Agriculture Solutions LLC
$189.99
Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
Amazon.com
Free shipping
$189.99
Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
Amazon.com
$13.29
$15.99
VIVOSUN Digital Ph And TDS Meter Kits, 0.01Ph High Accuracy Pen Type Ph Meter ± 2% Readout Accuracy 3-In-1 TDS EC Temperature Meter For Hydroponics,
Amazon.com
27K+
16% off
$13.29
$15.99
VIVOSUN Digital Ph And TDS Meter Kits, 0.01Ph High Accuracy Pen Type Ph Meter ± 2% Readout Accuracy 3-In-1 TDS EC Temperature Meter For Hydroponics,
Amazon.com
$129.50
APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
Amazon.com
986
Free shipping
$129.50
APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
Amazon.com
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
Free shipping
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
$25.99
ATC Digital PH Monitor - Aquarium Water Quality Testing Kit
Digitalzakka
$25.99
ATC Digital PH Monitor - Aquarium Water Quality Testing Kit
Digitalzakka
$9.99
TAEING 100Pcs Ph Test Strips, Universal Ph 0-14, Testing Ph For Urine Saliva Drinking Water Labs Aquariums Gyms Pools… (100)
Amazon.com
10
$9.99
TAEING 100Pcs Ph Test Strips, Universal Ph 0-14, Testing Ph For Urine Saliva Drinking Water Labs Aquariums Gyms Pools… (100)
Amazon.com
$50.24
$66.00
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
Free shipping
23% off
$50.24
$66.00
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
$78.57
PCE Instruments PCE-PHM 12, Aquarium Ph Meter With Temperature Compensation Up To 50 Deg. C
Selectum
$78.57
PCE Instruments PCE-PHM 12, Aquarium Ph Meter With Temperature Compensation Up To 50 Deg. C
Selectum
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$37.99
Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter And PH Tester For Aquarium And Pool Saltwater Water, 5 in 1 Salinity PH Temp EC And TDS
Amazon.com
Free shipping
$37.99
Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter And PH Tester For Aquarium And Pool Saltwater Water, 5 in 1 Salinity PH Temp EC And TDS
Amazon.com
$31.40
HM Digital PH-80, Hydrotester
Selectum
$31.40
HM Digital PH-80, Hydrotester
Selectum
$35.99
5-In-1 Digital Water Quality Tester High Precision Ph Tds Ec Salinity Temperature Measurement With Led Display Easy To Clean For Fish Tanks And Ponds
LightIntheBox.com
$35.99
5-In-1 Digital Water Quality Tester High Precision Ph Tds Ec Salinity Temperature Measurement With Led Display Easy To Clean For Fish Tanks And Ponds
LightIntheBox.com
$9.99
$11.99
Merydi Aquarium Test Strips,8 Way Aquarium Ammonia Test Strips For Saltwater Freshwater Aquariums,Pond Fish Tanks,150 Aquarium Test Kit-Test Ph,
Amazon.com
16% off
$9.99
$11.99
Merydi Aquarium Test Strips,8 Way Aquarium Ammonia Test Strips For Saltwater Freshwater Aquariums,Pond Fish Tanks,150 Aquarium Test Kit-Test Ph,
Amazon.com