Meters & Controllers

Aquarium water controllers, thermometers, salinity and pH monitors, probes, and other aquarium meters and controllers on sale here.
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HM Digital pH/ORP Electrode Storage Solution (60cc) Buy Now »
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HM Digital pH/ORP Electrode Storage Solution (60cc)

Buy: $9.95 Ships:
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$9.95
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11 mins
Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) New Buy Now »
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Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) New

Buy: $24.05 Ships:
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$24.05
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40 mins
Automatic Aquarium Water Level Controller Water Filler System Float Valve Buy Now »
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Automatic Aquarium Water Level Controller Water Filler System Float Valve

Buy: $30.94 Ships:
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$30.94
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44 mins
HM Digital Replacement PH Sensor for PH-200 Categorie, New Buy Now »
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HM Digital Replacement PH Sensor for PH-200 Categorie, New

Fast Shipping! Most Orders Arrive within 2-3 Days!
Buy: $34.97 Ships:
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$34.97
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1 hr
42 mins
Neptune Advanced Leak Detection Solid-Surface Probe Buy Now »
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Neptune Advanced Leak Detection Solid-Surface Probe

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$32.99
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3 hrs
21 mins
Neptune Wireless Expansion Module Vortech Compatible Buy Now »
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Neptune Wireless Expansion Module Vortech Compatible

Buy: $129.99 Ships:
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$129.99
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3 hrs
24 mins
Milwaukee MC510 ORP Controller with Mounting Kit, +/- 1000 mV, +/-5 mV Accuracy Buy Now »
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Milwaukee MC510 ORP Controller with Mounting Kit, +/- 1000 mV, +/-5 mV Accuracy

Buy: $171.17 Ships:
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$171.17
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3 hrs
43 mins
Neptune Systems New APEX Wi-Fi Controller System w free probe suction cup holder Buy Now »
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Neptune Systems New APEX Wi-Fi Controller System w free probe suction cup holder

Buy: $849.00 Ships:
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$849.00
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4 hrs
1 min
Coralife Digital Power Center Timer **FREE USA SHIPPING** Buy Now »

Coralife Digital Power Center Timer **FREE USA SHIPPING**

Buy: $34.99 Ships:
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$34.99
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5 hrs
21 mins
AquaEuro Dual Grounded Timer **FREE USA SHIPPING** Buy Now »

AquaEuro Dual Grounded Timer **FREE USA SHIPPING**

Buy: $16.99 Ships:
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$16.99
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5 hrs
24 mins
Hamilton Technology Dual Digital Aquarium Timer **FREE USA SHIPPING** Buy Now »

Hamilton Technology Dual Digital Aquarium Timer **FREE USA SHIPPING**

Buy: $29.99 Ships:
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$29.99
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5 hrs
28 mins
TUNZE Osmolator Universal 3155  Aquarium Auto Top Off System - 3155 Buy Now »
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TUNZE Osmolator Universal 3155 Aquarium Auto Top Off System - 3155

FREE USA SHIPPING, FULL MANUFACTURES WARRANTY
Buy: $199.99 Ships:
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$199.99
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5 hrs
47 mins
aquarium CO2 Solenoid Regulator + Bubble Counter & CHECK VALVE  - fish tank line Bid Now »
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aquarium CO2 Solenoid Regulator + Bubble Counter & CHECK VALVE - fish tank line

Bid: $109.99
Ships:
Free
$109.99
5 hrs
50 mins
Red Sea Seawater Refractometer, High Accuracy Buy Now »
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Red Sea Seawater Refractometer, High Accuracy

Buy: $57.95 Ships:
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$57.95
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6 hrs
22 mins
Floating Aquarim Thermometer w Suction Cup Water Fish Tank Temperature Measurer Buy Now »
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Floating Aquarim Thermometer w Suction Cup Water Fish Tank Temperature Measurer

Buy: $4.51 Ships:
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$4.51
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6 hrs
34 mins
Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature New Buy Now »
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Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature New

Buy: $9.73 Ships:
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$9.73
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6 hrs
50 mins
Marine Depot Pro Refractometer Buy Now »
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Marine Depot Pro Refractometer

Buy: $24.99 Ships:
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$24.99
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6 hrs
51 mins
MOKOQI Professional Digital LCD Aquarium Thermometer for Hydroponics & Aquacu... Buy Now »
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MOKOQI Professional Digital LCD Aquarium Thermometer for Hydroponics & Aquacu...

Buy: $10.41 Ships:
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$10.41
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7 hrs
32 mins
Reef Keeper lite aquarium controller Bid Now »

Reef Keeper lite aquarium controller

Bid: $71.00
Ships:
$10.00
$81.00
7 hrs
35 mins
Reef Keeper Lite Plus W/ Net controller Bid Now »

Reef Keeper Lite Plus W/ Net controller

Bid: $202.50
Ships:
$14.00
$216.50
7 hrs
36 mins
2x New Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black Buy Now »
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2x New Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black

Buy: $7.99 Ships:
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$7.99
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7 hrs
39 mins
American Marine Pinpoint Oxygen Monitor w/probe Buy Now »

American Marine Pinpoint Oxygen Monitor w/probe

Buy: $229.95 Ships:
Based on Zip
$229.95
Plus shipping
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8 hrs
27 mins
HUAHA LCD Display Digital Fahrenheit Thermometer-from -120℉ to 230℉ for Fish Buy Now »
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HUAHA LCD Display Digital Fahrenheit Thermometer-from -120℉ to 230℉ for Fish

Buy: $11.35 Ships:
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$11.35
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8 hrs
29 mins
Aquarium Temperature Controller for Heater/Cooling Fans (PLUG AND PLAY) Buy Now »
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Aquarium Temperature Controller for Heater/Cooling Fans (PLUG AND PLAY)

Buy: $65.00 Ships:
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$65.00
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8 hrs
48 mins
Aquarium CO2 Regulator for Diffuser water plants fish tank Atomizer 4/6mm line Bid Now »
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Aquarium CO2 Regulator for Diffuser water plants fish tank Atomizer 4/6mm line

Bid: $928.99
Ships:
Free
$928.99
9 hrs
28 mins
3 in 1 CO2 Diffuser bubble counter check valve 20mm (M)- aquarium Plant tank Buy Now »
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3 in 1 CO2 Diffuser bubble counter check valve 20mm (M)- aquarium Plant tank

Buy: $18.99 Ships:
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$18.99
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9 hrs
49 mins
Salinity Meter (Aquarium Systems / SeaTest) Bid Now » Buy Now »

Salinity Meter (Aquarium Systems / SeaTest)

Bid: $2.00
Buy: $5.00
Ships:
$2.87
$4.87
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10 hrs
Set of 2, LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature Buy Now »
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Set of 2, LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

Buy: $14.98 Ships:
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$14.98
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11 hrs
10 mins
Salinity Aquariums Refractometer, Aquarium Seawater - Dual Scale (1.0 to 1.070 Buy Now »
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Salinity Aquariums Refractometer, Aquarium Seawater - Dual Scale (1.0 to 1.070

Buy: $28.98 Ships:
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$28.98
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11 hrs
14 mins
DELTEC DD ATC SEAWATER REFRACTOMETER - MEASURE SALINITY SALTWATER REEF AQUARIUM Buy Now »
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DELTEC DD ATC SEAWATER REFRACTOMETER - MEASURE SALINITY SALTWATER REEF AQUARIUM

Buy: $69.99 Ships:
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$69.99
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11 hrs
22 mins
American Marine Pinpoint Oxygen Monitor Buy Now »

American Marine Pinpoint Oxygen Monitor

Buy: $158.29 Ships:
Based on Zip
$158.29
Plus shipping
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11 hrs
30 mins
NYOS REEFER Test Kit - Phosphate - The Coral Life Buy Now »

NYOS REEFER Test Kit - Phosphate - The Coral Life

Buy: $24.99 Ships:
Free
$24.99
Buy now
12 hrs
5 mins
aquarium auto top off Bid Now » Buy Now »

aquarium auto top off

Bid: $39.99
Buy: $51.99
Ships:
$6.99
$46.98
Buy now
12 hrs
7 mins
Milwaukee SMS122 pH Controller With Old  Probe Sensor Bid Now »

Milwaukee SMS122 pH Controller With Old Probe Sensor

Bid: $39.99
Ships:
$5.99
$45.98
12 hrs
33 mins
FishRFun 2950 Cordless Digital Aquarium Thermometer C / F Buy Now »

FishRFun 2950 Cordless Digital Aquarium Thermometer C / F

Buy: $3.82 Ships:
Based on Zip
$3.82
Plus shipping
Buy now
12 hrs
36 mins
Hanna Instruments pH 10.01 Calibration Solution 20 ml Sachet Buy Now »
Free Shipping

Hanna Instruments pH 10.01 Calibration Solution 20 ml Sachet

Buy: $4.95 Ships:
Free
$4.95
Buy now
12 hrs
50 mins
Milwaukee pH Meter SM-101 Buy Now »

Milwaukee pH Meter SM-101

Buy: $22.89 Ships:
Based on Zip
$22.89
Plus shipping
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12 hrs
55 mins
ORP Redox Meter Tester Pen - Marine Reef Aquarium Fish Tank Test Buy Now »
Free Shipping

ORP Redox Meter Tester Pen - Marine Reef Aquarium Fish Tank Test

Buy: $94.59 Ships:
Free
$94.59
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13 hrs
30 mins
Digital LCD Fish Tank Aquarium Water Thermometer Temperature with Glass Cleaner Buy Now »
Free Shipping

Digital LCD Fish Tank Aquarium Water Thermometer Temperature with Glass Cleaner

Buy: $10.99 Ships:
Free
$10.99
Buy now
13 hrs
35 mins
Hanna Instruments pH 7.01 Calibration Solution 20 ml Sachet FREE USA SHIPPING! Buy Now »
Free Shipping

Hanna Instruments pH 7.01 Calibration Solution 20 ml Sachet FREE USA SHIPPING!

Buy: $4.95 Ships:
Free
$4.95
Buy now
13 hrs
44 mins
Silicon Scientific LCD thermometer Great Preowned Unit Functional X3 Batteries Buy Now »

Silicon Scientific LCD thermometer Great Preowned Unit Functional X3 Batteries

Buy: $39.99 Ships:
$10.99
$50.98
Buy now
14 hrs
58 mins
API - Ammonia Aquarium Test Strips - 25 Strips Buy Now »

API - Ammonia Aquarium Test Strips - 25 Strips

Buy: $17.79 Ships:
$5.95
$23.74
Buy now
16 hrs
29 mins
Aquarium Pharmaceuticals Freshwater Master Test Kit Rapide & Precis - 1 Kit Buy Now »

Aquarium Pharmaceuticals Freshwater Master Test Kit Rapide & Precis - 1 Kit

Buy: $31.68 Ships:
$5.95
$37.63
Buy now
16 hrs
32 mins
CORALIFE - Deep Six Hydrometer - 1 Hydrometer Buy Now »

CORALIFE - Deep Six Hydrometer - 1 Hydrometer

Buy: $12.24 Ships:
$5.95
$18.19
Buy now
16 hrs
41 mins
3/8" ID by 1/2" OD Black Tubing 6 and 1/2 Feet aquarium water gardening Buy Now »
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3/8" ID by 1/2" OD Black Tubing 6 and 1/2 Feet aquarium water gardening

Buy: $13.49 Ships:
Free
$13.49
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17 hrs
9 mins
3/8" ID by 1/2" OD Black Tubing 14 and 1/2 Feet aquarium water gardening Buy Now »
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3/8" ID by 1/2" OD Black Tubing 14 and 1/2 Feet aquarium water gardening

Buy: $22.59 Ships:
Free
$22.59
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17 hrs
9 mins
Pet Magasin Digital Thermometer and Hygrometer for Terrariums and Aquariums Buy Now »
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Pet Magasin Digital Thermometer and Hygrometer for Terrariums and Aquariums

Buy: $15.69 Ships:
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$15.69
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17 hrs
36 mins
JBJ Automatic Top Off Water Level Controller for Aquarium Buy Now »
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JBJ Automatic Top Off Water Level Controller for Aquarium

Buy: $104.99 Ships:
Free
$104.99
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17 hrs
45 mins
American Marine PINPOINT pH Monitor + Calibration Fluids Buy Now »
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American Marine PINPOINT pH Monitor + Calibration Fluids

Buy: $139.99 Ships:
Free
$139.99
Buy now
17 hrs
47 mins
2-Pcs Aquarium Digital Thermometers include 4-Pcs Batteries for Fish Tank Buy Now »
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2-Pcs Aquarium Digital Thermometers include 4-Pcs Batteries for Fish Tank

Buy: $12.27 Ships:
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$12.27
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17 hrs
50 mins


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