Meters & Controllers

Aquarium water controllers, thermometers, salinity and pH monitors, probes, and other aquarium meters and controllers on sale here.
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Neptune Systems Apex Salinity (Conductivity) Module PM2 Buy Now »
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Neptune Systems Apex Salinity (Conductivity) Module PM2

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$90.00
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30 mins
Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) by Buy Now »
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Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) by

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51 mins
Solenoid Magnetic Valve Replacement AC100-240V for CO2 Regulator CE A2A Buy Now »
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Solenoid Magnetic Valve Replacement AC100-240V for CO2 Regulator CE A2A

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1 hr
4 mins
Aquarium Floating Glass Thermometer with Suction Cup Buy Now »
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Aquarium Floating Glass Thermometer with Suction Cup

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1 hr
15 mins
Standard Seawater 35 ppt Refractometer Calibration Solution - 60 ml, New, Free S Buy Now »
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Standard Seawater 35 ppt Refractometer Calibration Solution - 60 ml, New, Free S

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1 hr
29 mins
Electrode Probe BNC Connector Meter Sensor For Aquarium Hydroponic PH Controller Buy Now »
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Electrode Probe BNC Connector Meter Sensor For Aquarium Hydroponic PH Controller

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2 hrs
17 mins
5/10Pcs Aquarium Fish Tank Thermometer Temperature Paper Sticker Fahrenheit New Buy Now »
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5/10Pcs Aquarium Fish Tank Thermometer Temperature Paper Sticker Fahrenheit New

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4 hrs
22 mins
5/10Pcs Fish Tank Aquarium Paper Sticker Thermometer Temperature Fahrenheit °F Buy Now »
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5/10Pcs Fish Tank Aquarium Paper Sticker Thermometer Temperature Fahrenheit °F

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4 hrs
28 mins
JW Pet Company Smarttemp Thermometer Aquarium Accessory New Buy Now »
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JW Pet Company Smarttemp Thermometer Aquarium Accessory New

Buy: $6.69 Ships:
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$6.69
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4 hrs
36 mins
 seawater refractometer Buy Now »
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seawater refractometer

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$56.68
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5 hrs
42 mins
New American Marine Pinpoint Wireless Thermometer - TWO  Wireless Modules Buy Now »

New American Marine Pinpoint Wireless Thermometer - TWO Wireless Modules

Buy: $42.00 Ships:
$5.50
$47.50
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5 hrs
47 mins
Ade Advanced Optics Dual Scale 1.0 to 1.070 S.G. Salinity Refractometer for A... Buy Now »
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Ade Advanced Optics Dual Scale 1.0 to 1.070 S.G. Salinity Refractometer for A...

Buy: $31.16 Ships:
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$31.16
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6 hrs
39 mins
Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature 2 Buy Now »

Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature 2

Buy: $13.74 Ships:
$1.99
$15.73
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8 hrs
29 mins
Amer Thermal Instruments Liquid Crystal Vertical Aquarium Thermometer, Small Pet Buy Now »
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Amer Thermal Instruments Liquid Crystal Vertical Aquarium Thermometer, Small Pet

Buy: $16.35 Ships:
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$16.35
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8 hrs
35 mins
3ft USB (Aquabus) Cable Male to Male Buy Now »
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3ft USB (Aquabus) Cable Male to Male

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$4.69
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9 hrs
20 mins
6ft USB (Aquabus) Cable Male to Male Buy Now »
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6ft USB (Aquabus) Cable Male to Male

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$4.72
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9 hrs
20 mins
10ft USB (Aquabus) Cable Male to Male Buy Now »
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10ft USB (Aquabus) Cable Male to Male

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$5.36
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9 hrs
20 mins
15ft USB (Aquabus) Cable Male to Male Buy Now »
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15ft USB (Aquabus) Cable Male to Male

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$6.80
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9 hrs
20 mins
Marina Plastic Thermometer with Suction Cup Buy Now »
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Marina Plastic Thermometer with Suction Cup

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$6.52
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9 hrs
24 mins
 pmk par monitoring kit Buy Now »
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pmk par monitoring kit

Buy: $392.93 Ships:
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$392.93
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9 hrs
39 mins
Aquarium Floating Thermometer Suction Cup Proper Temperature Safe Zone Indicator Buy Now »
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Aquarium Floating Thermometer Suction Cup Proper Temperature Safe Zone Indicator

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$2.69
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9 hrs
44 mins
CNZ Digital LCD Thermometer For Aquarium Fish Tank Vivarium Reptile Terrarium Buy Now »
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CNZ Digital LCD Thermometer For Aquarium Fish Tank Vivarium Reptile Terrarium

Buy: $8.20 Ships:
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$8.20
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10 hrs
45 mins
Marina ThermoSensor In-Out Thermometer Buy Now »
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Marina ThermoSensor In-Out Thermometer

Buy: $9.75 Ships:
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$9.75
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11 hrs
5 mins
 HDE 2 Pack LCD Digital Fish Tank Aquarium Thermometer Terrarium Marine (Black) Buy Now »
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HDE 2 Pack LCD Digital Fish Tank Aquarium Thermometer Terrarium Marine (Black)

Buy: $12.32 Ships:
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$12.32
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11 hrs
8 mins
Diffuser for  Fluval Co2 20 Buy Now »
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Diffuser for Fluval Co2 20

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$10.99
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11 hrs
39 mins
ACE 8006850 Pool Thermometer, Large Fahrenheit/Celsius, Tie Off Cord, FREE SHIP Buy Now »
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ACE 8006850 Pool Thermometer, Large Fahrenheit/Celsius, Tie Off Cord, FREE SHIP

Buy: $6.25 Ships:
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$6.25
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11 hrs
57 mins
Flexi Plug Smart Bluetooth Power Controller for Aquarium Buy Now »
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Flexi Plug Smart Bluetooth Power Controller for Aquarium

Buy: $60.99 Ships:
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$60.99
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12 hrs
21 mins
neptune systems  double junction orp probe Buy Now »
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neptune systems double junction orp probe

Buy: $111.28 Ships:
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$111.28
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12 hrs
21 mins
Hanna Instruments HI736 Phosphorus Ultra Low Range Checker HC for Saltwater A... Buy Now »
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Hanna Instruments HI736 Phosphorus Ultra Low Range Checker HC for Saltwater A...

Buy: $75.63 Ships:
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$75.63
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12 hrs
30 mins
Hanna Instruments Checker Marine Alkalinity Colori Buy Now »
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Hanna Instruments Checker Marine Alkalinity Colori

Buy: $85.39 Ships:
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$85.39
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12 hrs
30 mins
Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature Buy Now »
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Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

Buy: $9.86 Ships:
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$9.86
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12 hrs
32 mins
Hanna Instruments Checker Total Chlorine Colorimeter Buy Now »
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Hanna Instruments Checker Total Chlorine Colorimeter

Buy: $96.42 Ships:
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$96.42
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12 hrs
37 mins
Hanna Instruments HI721 Iron Checker HC Handheld Colorimeter 0.00 to 5.00 ppm... Buy Now »
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Hanna Instruments HI721 Iron Checker HC Handheld Colorimeter 0.00 to 5.00 ppm...

Buy: $77.22 Ships:
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$77.22
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12 hrs
37 mins
CO2 REGULATOR w/ Working pressure gauge - Diffuser Solenoid Valve ATOMIZER plant Buy Now »
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CO2 REGULATOR w/ Working pressure gauge - Diffuser Solenoid Valve ATOMIZER plant

Buy: $39.95 Ships:
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$39.95
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13 hrs
2 mins
Co2 Regulator Double Gauge - Aquarium Adjustable for Co2 tank & Cartridge Tank Buy Now »
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Co2 Regulator Double Gauge - Aquarium Adjustable for Co2 tank & Cartridge Tank

Buy: $84.09 Ships:
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$84.09
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13 hrs
4 mins
Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black New Buy Now »
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Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black New

Buy: $5.59 Ships:
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$5.59
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13 hrs
4 mins
2 Glass Fishtanks Buy Now »

2 Glass Fishtanks

Buy: $30.00 Ships:
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$30.00
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13 hrs
18 mins
UP AQUA Aqualight Wave Timers - Aquarium Light Power Co2 Regulator Fish Tank Buy Now »
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UP AQUA Aqualight Wave Timers - Aquarium Light Power Co2 Regulator Fish Tank

Buy: $17.89 Ships:
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$17.89
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13 hrs
28 mins
Neptune Systems DOS dosing reef Apex Bid Now »

Neptune Systems DOS dosing reef Apex

Bid: $192.50
Ships:
Based on Zip
$192.50
Plus shipping
13 hrs
37 mins
CoZroom LCD Digital Aquarium Thermometer for Fish Tank Water Terrarium Temper... Buy Now »
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CoZroom LCD Digital Aquarium Thermometer for Fish Tank Water Terrarium Temper...

Buy: $14.10 Ships:
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$14.10
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13 hrs
45 mins
Current Usa Wireless Remote For Ramp Timer Pro. **Free Shipping** Buy Now »
Free Shipping

Current Usa Wireless Remote For Ramp Timer Pro. **Free Shipping**

Buy: $13.73 Ships:
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$13.73
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13 hrs
48 mins
Current Usa Single Ramp Timer. **Free Shipping** Buy Now »
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Current Usa Single Ramp Timer. **Free Shipping**

Buy: $33.33 Ships:
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$33.33
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13 hrs
48 mins
Hanna Instruments PH Meter Buy Now »
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Hanna Instruments PH Meter

Buy: $49.99 Ships:
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$49.99
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13 hrs
48 mins
Current Usa Replacement 2 Channel Wired Controller. **Free Shipping** Buy Now »
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Current Usa Replacement 2 Channel Wired Controller. **Free Shipping**

Buy: $25.75 Ships:
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$25.75
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13 hrs
48 mins
Jbj Lcd Stick On Thermometer. **Free Shipping** Buy Now »
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Jbj Lcd Stick On Thermometer. **Free Shipping**

Buy: $8.40 Ships:
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$8.40
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13 hrs
48 mins
Current Usa Dual Ramp Timer With Remote. **Free Shipping** Buy Now »
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Current Usa Dual Ramp Timer With Remote. **Free Shipping**

Buy: $56.37 Ships:
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$56.37
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13 hrs
48 mins
Current Usa Ramp Timer Pro With Wireless Remote. **Free Shipping** Buy Now »
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Current Usa Ramp Timer Pro With Wireless Remote. **Free Shipping**

Buy: $93.00 Ships:
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$93.00
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13 hrs
48 mins
Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) by Buy Now »
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Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) by

Buy: $31.12 Ships:
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$31.12
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13 hrs
56 mins
Neptune Systems Lab Grade ORP Probe Buy Now »
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Neptune Systems Lab Grade ORP Probe

Same Day Free Shipping On This Item.
Buy: $68.99 Ships:
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$68.99
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14 hrs
58 mins
Neptune Systems Apex Lunar Simulator Module (LSM) **FREE USA EXPRESS SHIPPING** Buy Now »

Neptune Systems Apex Lunar Simulator Module (LSM) **FREE USA EXPRESS SHIPPING**

Buy: $64.95 Ships:
Free
$64.95
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15 hrs
31 mins


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