Meters & Controllers | Surplus Network

JW Pet Fusion Smart Temp Magnet Style Aquarium Thermometer

JW Pet Fusion Smart Temp Magnet Style...

$6.75 USD

JW Pet Fusion Smart Temp Magnet Style...

$6.75 USD

Aquarium Fish Tank Thermometer Temp Sticker Stick on **FAHRENHEIT IN BOLD!**

Aquarium Fish Tank Thermometer Temp...

$1.99 USD

Aquarium Fish Tank Thermometer Temp...

$1.99 USD

1 Aquarium Fish Tank Thermometer Temp Sticker Stick On **FAHRENHEIT IN BOLD!**

1 Aquarium Fish Tank Thermometer Temp...

$1.99 USD

1 Aquarium Fish Tank Thermometer Temp...

$1.99 USD

Fish Tank Aquarium Thermometer Temperature Sticker Celsius Fahrenheit °C ℉

Fish Tank Aquarium Thermometer...

$1.65 USD

Fish Tank Aquarium Thermometer...

$1.65 USD

AQUANEAT 2 Pack Aquarium Thermometer Digital Reptile Fish Tank Water Temperature

AQUANEAT 2 Pack Aquarium Thermometer...

$8.99 USD

AQUANEAT 2 Pack Aquarium Thermometer...

$8.99 USD

Neptune System

$8.99 USD

$8.99 USD

Aquarium Fish Tank Water Thermometer Digital Electronic LCD Sensor Controller

Aquarium Fish Tank Water Thermometer...

$8.99 USD

Aquarium Fish Tank Water Thermometer...

$8.99 USD

Milwaukee MC122 PRO pH Controller For Aquarium CO2 System (Probe Not Included)

Milwaukee MC122 PRO pH Controller For...

$89.99 USD

Milwaukee MC122 PRO pH Controller For...

$89.99 USD

HANNA INSTRUMENTS HI784 MARINE AMONIA HANDHELD COLORIMETER CHECKER

HANNA INSTRUMENTS HI784 MARINE AMONIA...

$40.00 USD

HANNA INSTRUMENTS HI784 MARINE AMONIA...

$40.00 USD

Neptune System optical leak sensor

Neptune System optical leak sensor

$40.00 USD

Neptune System optical leak sensor

$40.00 USD

Aquarium Digital Thermometer Fish Tank Salt Water Terrarium

Aquarium Digital Thermometer Fish...

$6.29 USD

Aquarium Digital Thermometer Fish...

$6.29 USD

JBJ Nano ATO-20 Advanced Auto-Top-Off System JT-160 DC Pump (New in Box)

JBJ Nano ATO-20 Advanced Auto-Top-Off...

$49.99 USD

JBJ Nano ATO-20 Advanced Auto-Top-Off...

$49.99 USD

AQUANEAT Aquarium Thermometer Digital Fish Tank Temperature 3PCS

AQUANEAT Aquarium Thermometer Digital...

$11.79 USD

AQUANEAT Aquarium Thermometer Digital...

$11.79 USD

Fish Tank Thermometer High-precision Led Digital Display Aquarium Thermometer US

Fish Tank Thermometer High-precision...

$7.99 USD

Fish Tank Thermometer High-precision...

$7.99 USD

AQUANEAT 6 PCS Aquarium Thermometer Strips, Fish Tank Thermometer Sticker

AQUANEAT 6 PCS Aquarium Thermometer...

$7.99 USD

AQUANEAT 6 PCS Aquarium Thermometer...

$7.99 USD

AQUANEAT Aquarium Thermometer Digital Fish Tank Terrarium Water Temperature Test

AQUANEAT Aquarium Thermometer Digital...

$7.99 USD

AQUANEAT Aquarium Thermometer Digital...

$7.99 USD

JW Pet Fusion Smart Temp Weighted Aquarium Thermometer

JW Pet Fusion Smart Temp Weighted...

$6.50 USD

JW Pet Fusion Smart Temp Weighted...

$6.50 USD

Neptune Systems Apex DOS Dosing & Fluid Metering System w/ DDR Dosing Reservoir

Neptune Systems Apex DOS Dosing &...

$300.00 USD

Neptune Systems Apex DOS Dosing &...

$300.00 USD

Chihiros Dosing System - Automated Precision Nutrient Delivery for Your Aquarium

Chihiros Dosing System - Automated...

$189.00 USD

Chihiros Dosing System - Automated...

$189.00 USD

Aquarium Thermometer Rechargeable Digital LED Display Fish Tank Thermometer±0.9°

Aquarium Thermometer Rechargeable...

$12.34 USD

Aquarium Thermometer Rechargeable...

$12.34 USD

LCD Aquarium Digital Thermometer for Fish Tank Temperature Gauge Touch Screen

LCD Aquarium Digital Thermometer for...

$9.98 USD

LCD Aquarium Digital Thermometer for...

$9.98 USD

Aquatop Floating Glass Aquarium Thermometer w/ Suction Cup Mount

Aquatop Floating Glass Aquarium...

$7.95 USD

Aquatop Floating Glass Aquarium...

$7.95 USD

HYDROS Control 2 Starter Pack

HYDROS Control 2 Starter Pack

$209.99 USD

HYDROS Control 2 Starter Pack

$209.99 USD

$Brightwell Aquatics Refractometer Calibration Solution 60mL Salinity Salt Test$

Brightwell Aquatics Refractometer...

$11.99 USD

Brightwell Aquatics Refractometer...

$11.99 USD

auto water filler, Top off system, aquarium ATO sytem, water level controller

auto water filler, Top off system,...

$11.99 USD

auto water filler, Top off system,...

$11.99 USD

Osmolator Nano 3152 Auto Top Off - Tunze

Osmolator Nano 3152 Auto Top Off - Tunze

$100.00 USD

Osmolator Nano 3152 Auto Top Off - Tunze

$100.00 USD

PH Probe Meter Sensor BNC Connector Electrode For Aquarium Lab Controller Meter

PH Probe Meter Sensor BNC Connector...

$15.85 USD

PH Probe Meter Sensor BNC Connector...

$15.85 USD

Hagen Marina Stainless Steel Thermometer: Same Day Processing Time-

Hagen Marina Stainless Steel...

$6.47 USD

Hagen Marina Stainless Steel...

$6.47 USD

Electrode PH Probe Tester 0-14 PH Probe w/ BNC Connector Controller Meter Sensor

Electrode PH Probe Tester 0-14 PH...

$16.52 USD

Electrode PH Probe Tester 0-14 PH...

$16.52 USD

AQUANEAT Aquarium Thermometer Digital Fish Tank Temperature 6 PCS

AQUANEAT Aquarium Thermometer Digital...

$17.89 USD

AQUANEAT Aquarium Thermometer Digital...

$17.89 USD

New Glass Meter Aquarium Fish Tank Water Temperature Thermometer Suction CupYhf

New Glass Meter Aquarium Fish Tank...

$2.17 CAD

New Glass Meter Aquarium Fish Tank...

$2.17 CAD

Acryli Liquid Storage Bucket dosing pump Auto Top Off System Reservoir Container

Acryli Liquid Storage Bucket dosing...

$19.99 USD

Acryli Liquid Storage Bucket dosing...

$19.99 USD

New Neptune Systems Flow Sensor 1/4” Part# FS-25

New Neptune Systems Flow Sensor...

$19.99 USD

New Neptune Systems Flow Sensor...

$19.99 USD

Leak Detector Probe for Neptune Apex Advanced leak detector

Leak Detector Probe for Neptune Apex...

$19.99 USD

Leak Detector Probe for Neptune Apex...

$19.99 USD

Milwaukee MC122 PRO pH Controller Aquariums NOT COMPLETE! ONLY WHATS ON PICTURE

Milwaukee MC122 PRO pH Controller...

$19.99 USD

Milwaukee MC122 PRO pH Controller...

$19.99 USD

LCD Digital Aquarium Thermometer Reptile Fish Tank Water Terrarium Temperature

LCD Digital Aquarium Thermometer...

$19.99 USD

LCD Digital Aquarium Thermometer...

$19.99 USD

Neptune Systems APEX A2 Base Unit.

Neptune Systems APEX A2 Base Unit.

$249.00 USD

Neptune Systems APEX A2 Base Unit.

$249.00 USD

Milwaukee MA921B/2 Double Junction ORP Platinum Probe with Extended Cable

Milwaukee MA921B/2 Double Junction...

$64.94 USD

Milwaukee MA921B/2 Double Junction...

$64.94 USD

Auto Top Off 12v + Pump or Solenoid Valve Reef Aquarium Float Switch ATO System

Auto Top Off 12v + Pump or Solenoid...

$54.99 USD

Auto Top Off 12v + Pump or Solenoid...

$54.99 USD

One Aquarium Thermometer Temp Sticker USA SELLER STICK ON! 🇺🇸

One Aquarium Thermometer Temp Sticker...

$2.05 USD

One Aquarium Thermometer Temp Sticker...

$2.05 USD

Fish Tank Thermometer Temp Sticker USA SELLER STICK ON! 🇺🇸

Fish Tank Thermometer Temp Sticker ...

$2.05 USD

Fish Tank Thermometer Temp Sticker ...

$2.05 USD

Neptune Systems Apex Energy Bar 832 EB832

Neptune Systems Apex Energy Bar 832...

$214.99 USD

Neptune Systems Apex Energy Bar 832...

$214.99 USD

Digital LCD Display Thermometer Aquarium Fish Tank Temperature Water HOT

Digital LCD Display Thermometer...

$2.10 USD

Digital LCD Display Thermometer...

$2.10 USD

ReefRun Duo Red Sea Pump Controller - Red Sea

ReefRun Duo Red Sea Pump Controller -...

$169.99 USD

ReefRun Duo Red Sea Pump Controller -...

$169.99 USD

Neptune LSM Module

Neptune LSM Module

$30.00 USD

Neptune LSM Module

$30.00 USD

Mag took Auto Top Off

Mag took Auto Top Off

$30.00 USD

Mag took Auto Top Off

$30.00 USD

Neptune Systems Replacement Head Cap for Dosing Pump DOS

Neptune Systems Replacement Head Cap...

$34.99 USD

Neptune Systems Replacement Head Cap...

$34.99 USD

HI713-25 Phosphate Low Range Checker Reagent (25 Tests) - Hanna Instruments

HI713-25 Phosphate Low Range Checker...

$13.00 USD

HI713-25 Phosphate Low Range Checker...

$13.00 USD

ReefRun 7000 - DC Aquarium Return Pump - Red Sea

ReefRun 7000 - DC Aquarium Return...

$249.99 USD

ReefRun 7000 - DC Aquarium Return...

$249.99 USD

Aquarium Thermometer Rechargeable Digital LED Display Fish Tank Thermometer

Aquarium Thermometer Rechargeable...

$11.59 USD

Aquarium Thermometer Rechargeable...

$11.59 USD

Lifegard Aquatics Little Time Temp Aquarium Clock + Thermometer Fish Tank

Lifegard Aquatics Little Time Temp...

$13.99 USD

Lifegard Aquatics Little Time Temp...

$13.99 USD

Neptune Apex NG w/ EB832 Energy Bar, Temp , ORP, and PH Probes & MoreFull System

Neptune Apex NG w/ EB832 Energy Bar,...

$699.99 USD

Neptune Apex NG w/ EB832 Energy Bar,...

$699.99 USD

Neptune Apex NG w/ EB832 Energy Bar, Temp , ORP, and PH Probes & Display Module

Neptune Apex NG w/ EB832 Energy Bar,...

$550.00 USD

Neptune Apex NG w/ EB832 Energy Bar,...

$550.00 USD

CO2 Generator System For Planted Aquariums To 40 Gallons Organic Bio Safe

CO2 Generator System For Planted...

$18.99 USD

CO2 Generator System For Planted...

$18.99 USD

Aquatop Floating Glass Thermometer W/ Suction Cup Mount for Fish Tank Aquarium

Aquatop Floating Glass Thermometer W/...

$8.72 USD

Aquatop Floating Glass Thermometer W/...

$8.72 USD

Fish Tank Aquarium Thermometer Glass Mount Suction Cup Floating Temperature 5pcs

Fish Tank Aquarium Thermometer Glass...

$8.49 USD

Fish Tank Aquarium Thermometer Glass...

$8.49 USD

Auto Top Off Dual Float Switch Sensor ATO Water Level Controller 4 Reef Aquarium

Auto Top Off Dual Float Switch Sensor...

$44.99 USD

Auto Top Off Dual Float Switch Sensor...

$44.99 USD

Aquarium Control Board Wire Management System - CoralVue

Aquarium Control Board Wire...

$149.99 USD

Aquarium Control Board Wire...

$149.99 USD

Neptune Systems Apex Classic Controller

Neptune Systems Apex Classic Controller

$149.99 USD

Neptune Systems Apex Classic Controller

$149.99 USD

Magnetic 4 Probe Holder 3 Standard 1 Enlarged for Apex Neptune Temperature Probe

Magnetic 4 Probe Holder 3 Standard 1...

$22.39 USD

Magnetic 4 Probe Holder 3 Standard 1...

$22.39 USD

HM Digital pH Electrode Storage Solution (60cc)

HM Digital pH Electrode Storage...

$9.95 USD

HM Digital pH Electrode Storage...

$9.95 USD

Kamoer ATO One 2 SE Smart auto top Off System Silent Water Replenisher

Kamoer ATO One 2 SE Smart auto top...

$50.00 USD

Kamoer ATO One 2 SE Smart auto top...

$50.00 USD

Hanna Instruments HI758U Marine Calcium Checker Colorimeter Open Box

Hanna Instruments HI758U Marine...

$50.00 USD

Hanna Instruments HI758U Marine...

$50.00 USD

Aquarium Mini Embedded LED Digital Thermometer Temperature Heating Co Gift

Aquarium Mini Embedded LED Digital...

$1.76 USD

Aquarium Mini Embedded LED Digital...

$1.76 USD

Aquarium Thermometer Digital Fish Tank Thermometer Accurate Water

Aquarium Thermometer Digital Fish...

$10.33 USD

Aquarium Thermometer Digital Fish...

$10.33 USD

Reef Factory KH Keeper Plus

Reef Factory KH Keeper Plus

$656.19 USD

Reef Factory KH Keeper Plus

$656.19 USD

USA Shipping Aquarium Nano CO2 Diffuser With Customized Ceramic for Planted Tank

USA Shipping Aquarium Nano CO2...

$12.59 USD

USA Shipping Aquarium Nano CO2...

$12.59 USD

AutoAqua Smart Skimmer Security

AutoAqua Smart Skimmer Security

$47.99 USD

AutoAqua Smart Skimmer Security

$47.99 USD

Neptune Systems APEX ALD Module Leak Detector

Neptune Systems APEX ALD Module Leak...

$39.00 USD

Neptune Systems APEX ALD Module Leak...

$39.00 USD

Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Dis...

Fish Tank Thermometer, Touch Screen...

$18.43 USD

Fish Tank Thermometer, Touch Screen...

$18.43 USD

Smart Magnetic Stirir for Testing - AutoAqua

Smart Magnetic Stirir for Testing -...

$32.99 USD

Smart Magnetic Stirir for Testing -...

$32.99 USD

Neptune Display module

Neptune Display module

$75.00 USD

Neptune Display module

$75.00 USD

1 Neptune Systems Apex WXM Module For Ecotech Marine (3 Available)

1 Neptune Systems Apex WXM Module For...

$94.99 USD

1 Neptune Systems Apex WXM Module For...

$94.99 USD

Hydrometer Aquarium Fish Saltwater Reef Salt Water Specific Gravity Salinity PPT

Hydrometer Aquarium Fish Saltwater...

$9.99 USD

Hydrometer Aquarium Fish Saltwater...

$9.99 USD

Imagitarium Hydrometer with Thermometer for Saltwater New Sealed

Imagitarium Hydrometer with...

$9.99 USD

Imagitarium Hydrometer with...

$9.99 USD

Smart Magnetic Stirir for Testing - AutoAqua 1210-4

Smart Magnetic Stirir for Testing -...

$20.00 USD

Smart Magnetic Stirir for Testing -...

$20.00 USD

GHL Set KH Director KHD & GHL Doser 2.1 slave

GHL Set KH Director KHD & GHL Doser...

$510.00 USD

GHL Set KH Director KHD & GHL Doser...

$510.00 USD

Neptune systems energy bar 8 EB8 For Apex Classic controller

Neptune systems energy bar 8 EB8 For...

$119.99 USD

Neptune systems energy bar 8 EB8 For...

$119.99 USD

Neptune Systems Apex Energy Bar 832 Model No. EB832 w/ 5 Nekteck 360 Rotating

Neptune Systems Apex Energy Bar 832...

$254.99 USD

Neptune Systems Apex Energy Bar 832...

$254.99 USD

AMERICAN MARINE PINPOINT ORP MONITOR INCLUDES PROBE & CALIBRATION FLUIDS

AMERICAN MARINE PINPOINT ORP MONITOR...

$114.98 USD

AMERICAN MARINE PINPOINT ORP MONITOR...

$114.98 USD

Hanna Master Reef Beginner Kit (772 Alk, 758 Cal, 783 Mag, 782 HR Nit, 774 Phos)

Hanna Master Reef Beginner Kit (772...

$319.75 USD

Hanna Master Reef Beginner Kit (772...

$319.75 USD

Hikari Accuprobe Hydrometer for Fish Tank Aquarium

Hikari Accuprobe Hydrometer for Fish...

$13.95 USD

Hikari Accuprobe Hydrometer for Fish...

$13.95 USD

Neptune Systems Apex Optical Level Sensor Part # OS-1 NEW

Neptune Systems Apex Optical Level...

$28.99 USD

Neptune Systems Apex Optical Level...

$28.99 USD

Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aq

Fish Tank Digital Thermometer...

$27.56 USD

Fish Tank Digital Thermometer...

$27.56 USD

HI701-25 Free Chlorine Checker Reagent (25 Tests) - Hanna Instruments

HI701-25 Free Chlorine Checker...

$10.00 USD

HI701-25 Free Chlorine Checker...

$10.00 USD

PH Probe Meter Sensor BNC Connector Electrode For Aquarium Lab Controller Meter

PH Probe Meter Sensor BNC Connector...

$15.99 USD

PH Probe Meter Sensor BNC Connector...

$15.99 USD

Tunze Osmolator Universal 3155 Auto Top Off + FREE Tunze 5002.250 Storage conta

Tunze Osmolator Universal 3155 Auto...

$189.99 USD

Tunze Osmolator Universal 3155 Auto...

$189.99 USD

Aquarium Thermometer Digital Fish Tank Thermometer Accurate Water

Aquarium Thermometer Digital Fish...

$10.56 USD

Aquarium Thermometer Digital Fish...

$10.56 USD

Aquarium Thermometer Rechargeable Digital LED Display Fish Tank Thermometer H...

Aquarium Thermometer Rechargeable...

$11.54 USD

Aquarium Thermometer Rechargeable...

$11.54 USD

AWM Neptune Ai Wireless Module

AWM Neptune Ai Wireless Module

$80.00 USD

AWM Neptune Ai Wireless Module

$80.00 USD

FL!PPER Aquarium Auto Top Off System ATO Water Level Maintainer for Fresh and...

FL!PPER Aquarium Auto Top Off System...

$104.89 USD

FL!PPER Aquarium Auto Top Off System...

$104.89 USD

Aquarium L Thermometer Digita LED Fish Tank Temperature Gauge Accurate Display

Aquarium L Thermometer Digita LED...

$10.87 USD

Aquarium L Thermometer Digita LED...

$10.87 USD