Shop Aquarium O2 and pH Tester

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$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
30
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
30
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
$164.78
Ph Meter, LCD Display, 0.00 To 14.00 Range
Amazon.com
Free shipping
$164.78
Ph Meter, LCD Display, 0.00 To 14.00 Range
Amazon.com
Free shipping
$99.95
$112.45
PH-200 HM Digital Professional Grade Handheld Ph Meter
US Water Systems
11% off
$99.95
$112.45
PH-200 HM Digital Professional Grade Handheld Ph Meter
US Water Systems
$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
1K+
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
1K+
$332.23
Oakton Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 3563460
Grainger
$332.23
Oakton Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 3563460
Grainger
$250.68
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH110
Grainger
300
$250.68
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH110
Grainger
300
$220.08
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph +/-1 Digit, 0.01 Ph Ph Resolution, Ph, +/-1.8F Model: PH90
Grainger
23
$220.08
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph +/-1 Digit, 0.01 Ph Ph Resolution, Ph, +/-1.8F Model: PH90
Grainger
23
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$50.24
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
8K+
Free shipping
$50.24
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
8K+
$32.99
Aquarium Salt Tester -Pool Salt Tester, Versatile 5 In1 Salinity, PH, TDS, EC, And Temperature Meter, Digital Salinity Tester For Saltwater Aquarium,
Amazon.com
203
$32.99
Aquarium Salt Tester -Pool Salt Tester, Versatile 5 In1 Salinity, PH, TDS, EC, And Temperature Meter, Digital Salinity Tester For Saltwater Aquarium,
Amazon.com
203
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
300
Free shipping
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
300
$46.99
Ph Meter For Water 7 in 1 PH/TDS/EC/Salt/S.G/ORP/Temp Meter,Ph Tester Digital Backlit Waterproof LCD,TDS Meter EC Meter PPM Meter Suitable For Pools,
Amazon.com
26
Free shipping
$46.99
Ph Meter For Water 7 in 1 PH/TDS/EC/Salt/S.G/ORP/Temp Meter,Ph Tester Digital Backlit Waterproof LCD,TDS Meter EC Meter PPM Meter Suitable For Pools,
Amazon.com
26
$153.11
Oakton Phtestr 30 Waterproof Ph Testr 30 Pocket Tester
Amazon.com
30
Free shipping
$153.11
Oakton Phtestr 30 Waterproof Ph Testr 30 Pocket Tester
Amazon.com
30
$336.59
Lamotte Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 1766
Grainger
$336.59
Lamotte Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 1766
Grainger
$243.21
Extech Ph/Mv/Temperature Meter: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-10
Grainger
$243.21
Extech Ph/Mv/Temperature Meter: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-10
Grainger
$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
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
Free shipping
$195.60
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH100
Grainger
$195.60
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH100
Grainger
$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
2K+
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
2K+
$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
10
$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
$161.00
Wifi Ph/Orp Controller Digital Aquarium Ph Tester Orp Redox Meter
eBay
$161.00
Wifi Ph/Orp Controller Digital Aquarium Ph Tester Orp Redox Meter
eBay
$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
$69.97
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
$69.97
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
$230.49
Oakton Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points, Ph Model: WD-35634-14
Grainger
$230.49
Oakton Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points, Ph Model: WD-35634-14
Grainger
$43.27
Professional Ph Meter Pen Type Ph Water Quality Tester For Aquarium
eBay
$43.27
Professional Ph Meter Pen Type Ph Water Quality Tester For Aquarium
eBay
$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
Free shipping
$131.15
Oakton Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.1 Ph, 0.1 Ph Ph Resolution, 3 Calibration Points, Auto Model: 3563405
Grainger
3
$131.15
Oakton Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.1 Ph, 0.1 Ph Ph Resolution, 3 Calibration Points, Auto Model: 3563405
Grainger
3
$219.62
Wifi Online Meter Ph Orp Temp Aquarium Water Quality Tester Monitor
eBay
$219.62
Wifi Online Meter Ph Orp Temp Aquarium Water Quality Tester Monitor
eBay
$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
$141.83
$150.88
Aquarium Water Quality Detector Tds&Ph Monitor Fish Tank Ph Tester
eBay
$141.83
$150.88
Aquarium Water Quality Detector Tds&Ph Monitor Fish Tank Ph Tester
eBay
$74.31
High Precision Portable Ph/Ec Detecto Aquarium Ph Test Pen
eBay
$74.31
High Precision Portable Ph/Ec Detecto Aquarium Ph Test Pen
eBay
$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
Free shipping
$9.40
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
$9.40
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
12
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
12
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Shop Aquarium O2 and pH Tester

Sponsored
About our ads
$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
30
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
30
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
$164.78
Ph Meter, LCD Display, 0.00 To 14.00 Range
Amazon.com
Free shipping
$164.78
Ph Meter, LCD Display, 0.00 To 14.00 Range
Amazon.com
Free shipping
$99.95
$112.45
PH-200 HM Digital Professional Grade Handheld Ph Meter
US Water Systems
11% off
$99.95
$112.45
PH-200 HM Digital Professional Grade Handheld Ph Meter
US Water Systems
$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
1K+
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
1K+
$332.23
Oakton Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 3563460
Grainger
$332.23
Oakton Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 3563460
Grainger
$250.68
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH110
Grainger
300
$250.68
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH110
Grainger
300
$220.08
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph +/-1 Digit, 0.01 Ph Ph Resolution, Ph, +/-1.8F Model: PH90
Grainger
23
$220.08
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph +/-1 Digit, 0.01 Ph Ph Resolution, Ph, +/-1.8F Model: PH90
Grainger
23
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$50.24
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
8K+
Free shipping
$50.24
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof Ph Tester Kit, ±0.1 Ph Accuracy
Amazon.com
8K+
$32.99
Aquarium Salt Tester -Pool Salt Tester, Versatile 5 In1 Salinity, PH, TDS, EC, And Temperature Meter, Digital Salinity Tester For Saltwater Aquarium,
Amazon.com
203
$32.99
Aquarium Salt Tester -Pool Salt Tester, Versatile 5 In1 Salinity, PH, TDS, EC, And Temperature Meter, Digital Salinity Tester For Saltwater Aquarium,
Amazon.com
203
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
300
Free shipping
$250.68
Extech PH110 Waterproof Exstik Ph Meter
Amazon.com
300
$46.99
Ph Meter For Water 7 in 1 PH/TDS/EC/Salt/S.G/ORP/Temp Meter,Ph Tester Digital Backlit Waterproof LCD,TDS Meter EC Meter PPM Meter Suitable For Pools,
Amazon.com
26
Free shipping
$46.99
Ph Meter For Water 7 in 1 PH/TDS/EC/Salt/S.G/ORP/Temp Meter,Ph Tester Digital Backlit Waterproof LCD,TDS Meter EC Meter PPM Meter Suitable For Pools,
Amazon.com
26
$153.11
Oakton Phtestr 30 Waterproof Ph Testr 30 Pocket Tester
Amazon.com
30
Free shipping
$153.11
Oakton Phtestr 30 Waterproof Ph Testr 30 Pocket Tester
Amazon.com
30
$336.59
Lamotte Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 1766
Grainger
$336.59
Lamotte Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: 1766
Grainger
$243.21
Extech Ph/Mv/Temperature Meter: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-10
Grainger
$243.21
Extech Ph/Mv/Temperature Meter: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-10
Grainger
$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
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
Free shipping
$195.60
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH100
Grainger
$195.60
Extech Pocket Ph Tester: 0 Ph To 14 Ph, +/-0.01 Ph, 0.01 Ph Ph Resolution, 3 Calibration Points Model: PH100
Grainger