Meters & Controllers

Aquarium water controllers, thermometers, salinity and pH monitors, probes, and other aquarium meters and controllers on sale here.
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Apex Neptune System Conductivity Probe for Apex Controllers AKA Salinity Monitor Buy Now »
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Apex Neptune System Conductivity Probe for Apex Controllers AKA Salinity Monitor

Buy: $144.95 Ships:
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$144.95
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18 mins
Neptune Systems 2 Channel Apex to Light Dimming Cable Buy Now »
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Neptune Systems 2 Channel Apex to Light Dimming Cable

Buy: $18.95 Ships:
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$18.95
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1 hr
16 mins
Coralife Battery-Operated Digital Thermometer ~ NEW Buy Now »
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Coralife Battery-Operated Digital Thermometer ~ NEW

Buy: $14.95 Ships:
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$14.95
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1 hr
27 mins
KollerCraft TOM Temp Alert Digital Thermometer for Aquariums! Buy Now »
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KollerCraft TOM Temp Alert Digital Thermometer for Aquariums!

Buy: $23.27 Ships:
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$23.27
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1 hr
32 mins
Coralife Digital Thermometer Good For Terrariums Fresh and Saltwater Aquariums Buy Now »

Coralife Digital Thermometer Good For Terrariums Fresh and Saltwater Aquariums

Buy: $7.49 Ships:
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$7.49
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1 hr
56 mins
Apera SX610 pH Meter pH Pen Tester Education Test Tube Replaceable Probe ATC Buy Now »

Apera SX610 pH Meter pH Pen Tester Education Test Tube Replaceable Probe ATC

Complete Kit with Premixed Buffers and Storage Solution
Buy: $47.79 Ships:
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$47.79
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2 hrs
3 mins
IceCap Dual Optical ATO - Auto Top Off Controller Buy Now »
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IceCap Dual Optical ATO - Auto Top Off Controller

Buy: $124.99 Ships:
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$124.99
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2 hrs
21 mins
AQUATEK CO2 Regulator Mini, New, Free Shipping Buy Now »
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AQUATEK CO2 Regulator Mini, New, Free Shipping

Buy: $104.17 Ships:
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$104.17
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2 hrs
26 mins
 Refractometer, Aquarium and Seawater - Dual Scale (1.0 To 1.070 S.G.) Free Ship Buy Now »
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Refractometer, Aquarium and Seawater - Dual Scale (1.0 To 1.070 S.G.) Free Ship

Buy: $29.95 Ships:
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$29.95
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2 hrs
29 mins
AQUATEK CO2-Proof Tubing 16 Feet, New, Free Shipping Buy Now »
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AQUATEK CO2-Proof Tubing 16 Feet, New, Free Shipping

Buy: $12.69 Ships:
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$12.69
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2 hrs
44 mins
Digital Fish Tank Aquarium Thermometer SaltWater Safe LCD Screen BRANDNEW Bid Now »
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Digital Fish Tank Aquarium Thermometer SaltWater Safe LCD Screen BRANDNEW

Bid: $11.29
Ships:
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$11.29
2 hrs
53 mins
Aquarium ThermometerElectronic Water Detector Digital Thermograph with La... New Buy Now »
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Aquarium ThermometerElectronic Water Detector Digital Thermograph with La... New

Buy: $11.52 Ships:
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$11.52
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2 hrs
56 mins
New Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black US Buy Now »
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New Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black US

Buy: $4.59 Ships:
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$4.59
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3 hrs
23 mins
American Marine Pinpoint pH Probe Buy Now »

American Marine Pinpoint pH Probe

Buy: $39.95 Ships:
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$39.95
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3 hrs
29 mins
Neptune Systems AMD Apex Silver Display Module Brand New! Buy Now »
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Neptune Systems AMD Apex Silver Display Module Brand New!

Buy: $122.27 Ships:
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$122.27
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4 hrs
11 mins
Neptune Systems Energy Bar 4 - NEW IN BOX Buy Now »

Neptune Systems Energy Bar 4 - NEW IN BOX

Buy: $119.95 Ships:
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$119.95
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4 hrs
27 mins
Coralife Deep Six Testing Hydrometer Blister. **Free Shipping** Buy Now »
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Coralife Deep Six Testing Hydrometer Blister. **Free Shipping**

Buy: $12.38 Ships:
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$12.38
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4 hrs
40 mins
Zoo Med Betta Digital Thermometer. **Free Shipping** Buy Now »
Free Shipping

Zoo Med Betta Digital Thermometer. **Free Shipping**

Buy: $11.16 Ships:
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$11.16
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4 hrs
40 mins
Coralife Electronic Digital Thermometer Aquarium. **Free Shipping** Buy Now »
Free Shipping

Coralife Electronic Digital Thermometer Aquarium. **Free Shipping**

Buy: $12.22 Ships:
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$12.22
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4 hrs
40 mins
Zoo Med Aquasun Dual Timer. **Free Shipping** Buy Now »
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Zoo Med Aquasun Dual Timer. **Free Shipping**

Buy: $16.50 Ships:
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$16.50
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4 hrs
40 mins
Red Sea Fish Pharm ARE21525 Marine Care Test Kit for Aquarium Brand New! Buy Now »
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Red Sea Fish Pharm ARE21525 Marine Care Test Kit for Aquarium Brand New!

Buy: $46.61 Ships:
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$46.61
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5 hrs
20 mins
Innovative Marine HydroFill Ti – ATO Controller Aquarium Automatic Top Off 7503 Buy Now »
Free Shipping

Innovative Marine HydroFill Ti – ATO Controller Aquarium Automatic Top Off 7503

Buy: $69.98 Ships:
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$69.98
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5 hrs
27 mins
API - Freshwater/Saltwater Nitrate Test Kit - 90 Tests Buy Now »

API - Freshwater/Saltwater Nitrate Test Kit - 90 Tests

Buy: $13.15 Ships:
$5.95
$19.10
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5 hrs
41 mins
Reef Angel Plus Controller - Analog Dimming Buy Now »

Reef Angel Plus Controller - Analog Dimming

Buy: $289.00 Ships:
Based on Zip
$289.00
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5 hrs
51 mins
AMERICAN MARINE PINPOINT PH PROBE BNC 10' CABLE Buy Now »

AMERICAN MARINE PINPOINT PH PROBE BNC 10' CABLE

Buy: $39.95 Ships:
Free
$39.95
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6 hrs
45 mins
American Marine Pinpoint Temperature Sensor (for Wireless Thermometer) Buy Now »

American Marine Pinpoint Temperature Sensor (for Wireless Thermometer)

Buy: $15.29 Ships:
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$15.29
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7 hrs
32 mins
NEPTUNE SYSTEMS APEX EB832 ENERGY BAR - 1LINK POWER 100W DC POWER SUPPLY Buy Now »
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NEPTUNE SYSTEMS APEX EB832 ENERGY BAR - 1LINK POWER 100W DC POWER SUPPLY

AUTHORIZED DEALER - FULL WARRANTY - FAST FREE SHIPPING
Buy: $249.95 Ships:
Free
$249.95
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7 hrs
33 mins
Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.) Buy Now »
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Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.)

Buy: $23.88 Ships:
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$23.88
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7 hrs
43 mins
ISTA UFO CO2 Diffuser ceramic applied to assures most delicate CO2 diffusing Buy Now »
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ISTA UFO CO2 Diffuser ceramic applied to assures most delicate CO2 diffusing

Buy: $13.45 Ships:
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$13.45
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7 hrs
48 mins
Red Sea Calcium Pro Aquarium Test Kit CA Live Coral Nano Reef 75 test Buy Now »

Red Sea Calcium Pro Aquarium Test Kit CA Live Coral Nano Reef 75 test

Buy: $34.49 Ships:
Based on Zip
$34.49
Plus shipping
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8 hrs
15 mins
Aquarium Glass Float Hydrometer With Thermometer Salt Marine 20cm T1 Buy Now »

Aquarium Glass Float Hydrometer With Thermometer Salt Marine 20cm T1

Buy: $2.99 Ships:
Based on Zip
$2.99
Plus shipping
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8 hrs
21 mins
Hydor smart levev control Bid Now »
Free Shipping

Hydor smart levev control

reef aquarium marine fish corals doser frag filter ato
Bid: $51.00
Ships:
Free
$51.00
9 hrs
41 mins
Pet Magasin Digital Thermometer and Hygrometer for Terrariums and Aquariums Buy Now »
Free Shipping

Pet Magasin Digital Thermometer and Hygrometer for Terrariums and Aquariums

Buy: $10.45 Ships:
Free
$10.45
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9 hrs
41 mins
KollerCraft TOM Temp Alert Digital Thermometer for Aquariums Buy Now »
Free Shipping

KollerCraft TOM Temp Alert Digital Thermometer for Aquariums

Buy: $21.76 Ships:
Free
$21.76
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10 hrs
1 min
Tunze Turbelle Moonlight Photo Sensor 7097.050 for Tunze pumps controllers Buy Now »
Free Shipping

Tunze Turbelle Moonlight Photo Sensor 7097.050 for Tunze pumps controllers

Buy: $19.95 Ships:
Free
$19.95
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10 hrs
3 mins
Apex Display Module ADM Silver - Neptune Systems Buy Now »
Free Shipping

Apex Display Module ADM Silver - Neptune Systems

FULL WARRANTY - AUTHORIZED DEALER - FAST FREE SHIPPING
Buy: $99.95 Ships:
Free
$99.95
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10 hrs
11 mins
2 x 24" T5 HO High Output 24 watt bulb Actinic Blue color Buy Now »
Free Shipping

2 x 24" T5 HO High Output 24 watt bulb Actinic Blue color

Buy: $19.99 Ships:
Free
$19.99
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10 hrs
27 mins
4 x 24" T5 HO High Output 24 watt bulb Actinic Blue color Buy Now »
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4 x 24" T5 HO High Output 24 watt bulb Actinic Blue color

Buy: $26.95 Ships:
Free
$26.95
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10 hrs
28 mins
HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accur Buy Now »
Free Shipping

HM Digital DM-1 In-Line Dual TDS Monitor, 0-9990 ppm Range, +/- 2% Readout Accur

Buy: $26.43 Ships:
Free
$26.43
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10 hrs
33 mins
2 x 36" T5 HO High Output 39 watt bulb Actinic Blue color Buy Now »
Free Shipping

2 x 36" T5 HO High Output 39 watt bulb Actinic Blue color

Buy: $26.95 Ships:
Free
$26.95
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10 hrs
34 mins
PH Controller System - electrode probe BNC CO2 Regulator Timer tetser 100~240V Buy Now »
Free Shipping

PH Controller System - electrode probe BNC CO2 Regulator Timer tetser 100 ~ 240V

Buy: $252.09 Ships:
Free
$252.09
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10 hrs
36 mins
AQUATEK CO2-Proof Tubing 16 Feet Buy Now »
Free Shipping

AQUATEK CO2-Proof Tubing 16 Feet

Buy: $12.77 Ships:
Free
$12.77
Buy now
10 hrs
45 mins
API - Freshwater/Saltwater Phosphate Test Kit - 150 Tests Buy Now »

API - Freshwater/Saltwater Phosphate Test Kit - 150 Tests

Buy: $15.33 Ships:
$4.99
$20.32
Buy now
11 hrs
5 mins
SEACHEM - Ammonia Alert - 1 Year Monitor Buy Now »

SEACHEM - Ammonia Alert - 1 Year Monitor

Buy: $10.63 Ships:
$5.95
$16.58
Buy now
11 hrs
6 mins
Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature Buy Now »
Free Shipping

Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

Buy: $9.79 Ships:
Free
$9.79
Buy now
11 hrs
30 mins
HM DIGITAL DM-2 Commercial In-Line Dual TDS Monitor Meter Buy Now »
Free Shipping

HM DIGITAL DM-2 Commercial In-Line Dual TDS Monitor Meter

Buy: $44.95 Ships:
Free
$44.95
Buy now
11 hrs
31 mins
American Marine Pinpoint ORP Controller - FREE EXPRESS USA SHIPPING Buy Now »

American Marine Pinpoint ORP Controller - FREE EXPRESS USA SHIPPING

Buy: $209.99 Ships:
Free
$209.99
Buy now
11 hrs
34 mins
American Marine Pinpoint pH Controller - FREE EXPRESS USA SHIPPING Buy Now »

American Marine Pinpoint pH Controller - FREE EXPRESS USA SHIPPING

Buy: $206.99 Ships:
Free
$206.99
Buy now
11 hrs
35 mins
Horizontal Aquarium Thermometers Aquarium Thermometer (Pack of 3) Buy Now »
Free Shipping

Horizontal Aquarium Thermometers Aquarium Thermometer (Pack of 3)

Buy: $15.78 Ships:
Free
$15.78
Buy now
12 hrs
22 mins
5x Digital LCD Fish Tank Aquarium Marine Water Aquarium Thermometer Temperature Buy Now »
Free Shipping

5x Digital LCD Fish Tank Aquarium Marine Water Aquarium Thermometer Temperature

Buy: $16.99 Ships:
Free
$16.99
Buy now
12 hrs
36 mins


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