Meters & Controllers | Surplus Network

JW Pet Fusion Smart Temp Magnet Style Aquarium Thermometer

JW Pet Fusion Smart Temp Magnet Style...

$7.00 USD

JW Pet Fusion Smart Temp Magnet Style...

$7.00 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

coralvue hydros Controlled & Wavemakers

coralvue hydros Controlled & Wavemakers

$700.00 USD

coralvue hydros Controlled & Wavemakers

$700.00 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

Kamoer New ATO One SE Smart auto top off System Water Replenisher -See descrip-

Kamoer New ATO One SE Smart auto top...

$30.00 USD

Kamoer New ATO One SE Smart auto top...

$30.00 USD

Digital Aquatics Reef Keeper Lite Aquarium Controller w/ iTemp Temperature Probe

Digital Aquatics Reef Keeper Lite...

$30.00 USD

Digital Aquatics Reef Keeper Lite...

$30.00 USD

ACRYLIC LIQUID STORAGE BUCKET DOSING AUTO TOP OFF SYSTEM RESERVOIR CONTAINER

ACRYLIC LIQUID STORAGE BUCKET DOSING...

$30.00 USD

ACRYLIC LIQUID STORAGE BUCKET DOSING...

$30.00 USD

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

Aquarium Digital Thermometer Fish Tank Salt Water Terrarium

Aquarium Digital Thermometer Fish...

$6.29 USD

Aquarium Digital Thermometer Fish...

$6.29 USD

Dual Fish Tank Aquarium Thermometer Temperature Sticker Celsius Fahrenheit °C

Dual Fish Tank Aquarium Thermometer...

$1.95 USD

Dual Fish Tank Aquarium Thermometer...

$1.95 USD

Neptune Apex EL, Extra Power Bar, And More

Neptune Apex EL, Extra Power Bar, And...

$380.00 USD

Neptune Apex EL, Extra Power Bar, And...

$380.00 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

Aquarium Thermometer Rechargeable Digital LED Display Fish Tank Thermometer

Aquarium Thermometer Rechargeable...

$10.12 USD

Aquarium Thermometer Rechargeable...

$10.12 USD

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

Fish Tank Thermometer High-precision...

$7.51 USD

Fish Tank Thermometer High-precision...

$7.51 USD

GHL - Profilux 4e Aquarium Controller & Doser 2.1 - In Good Condition

GHL - Profilux 4e Aquarium Controller...

$450.00 USD

GHL - Profilux 4e Aquarium Controller...

$450.00 USD

Digital LCD Thermometer Aquarium Fish Tank Vivarium-Water Marine On Probe

Digital LCD Thermometer Aquarium Fish...

$1.86 USD

Digital LCD Thermometer Aquarium Fish...

$1.86 USD

Osmolator Nano 3152 Auto Top Off - Tunze

Osmolator Nano 3152 Auto Top Off - Tunze

$80.00 USD

Osmolator Nano 3152 Auto Top Off - Tunze

$80.00 USD

Neptune Systems PM1 pH/ORP Probe Module - Works with Apex Controllers

Neptune Systems PM1 pH/ORP Probe...

$80.00 USD

Neptune Systems PM1 pH/ORP Probe...

$80.00 USD

Neptune Systems Apex Lab Grade Salinity - Conductivity Probe

Neptune Systems Apex Lab Grade...

$139.00 USD

Neptune Systems Apex Lab Grade...

$139.00 USD

Dual Aquarium Fish Tank Thermometer Temperature Sticker Stick-on Fahrenheit °F

Dual Aquarium Fish Tank Thermometer...

$2.41 USD

Dual Aquarium Fish Tank Thermometer...

$2.41 USD

Hanna Instruments HI98103 Checker®...

$40.99 USD

Hanna Instruments HI98103 Checker®...

$40.99 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

AQUANEAT Aquarium Thermometer Digital Fish Tank Terrarium Water Temperature Test

AQUANEAT Aquarium Thermometer Digital...

$7.99 USD

AQUANEAT Aquarium Thermometer Digital...

$7.99 USD

Neptune Systems MOS Magnetic Optical Sensor - NEW

Neptune Systems MOS Magnetic Optical...

$29.95 USD

Neptune Systems MOS Magnetic Optical...

$29.95 USD

JW Pet Fusion Smart Temp Non-Standing Magnet Style Aquarium Thermometer

JW Pet Fusion Smart Temp ...

$7.90 USD

JW Pet Fusion Smart Temp ...

$7.90 USD

Reef Factory KH Keeper Plus - Excellent Condition

Reef Factory KH Keeper Plus -...

$390.00 USD

Reef Factory KH Keeper Plus -...

$390.00 USD

MagTool Aquarium Auto Top Off Refilling System With Dual Optical Sensor- NEW

MagTool Aquarium Auto Top Off...

$29.99 USD

MagTool Aquarium Auto Top Off...

$29.99 USD

NEPTUNE SYSTEMS PMUP Practical Multi-Purpose Utility Pump

NEPTUNE SYSTEMS PMUP Practical...

$29.99 USD

NEPTUNE SYSTEMS PMUP Practical...

$29.99 USD

Neptune Systems APEX EL Base Unit.

Neptune Systems APEX EL Base Unit.

$159.99 USD

Neptune Systems APEX EL Base Unit.

$159.99 USD

Optical sensor for Neptune Apex

Optical sensor for Neptune Apex

$23.99 USD

Optical sensor for Neptune Apex

$23.99 USD

Neptune System

$10.95 USD

$10.95 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

At-200 Auto Top Off Saltwater Aquarium Water Smart ATO System Both Reef Etc NEW

At-200 Auto Top Off Saltwater...

$36.99 USD

At-200 Auto Top Off Saltwater...

$36.99 USD

Neptune Systems 1/4" Tubing Solenoid Valve Model No. SV-1

Neptune Systems 1/4" Tubing Solenoid...

$24.99 USD

Neptune Systems 1/4" Tubing Solenoid...

$24.99 USD

Used Neptune Systems Apex Temperature Probe

Used Neptune Systems Apex Temperature...

$24.99 USD

Used Neptune Systems Apex Temperature...

$24.99 USD

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

HI713-25 Phosphate Low Range Checker...

$17.99 USD

HI713-25 Phosphate Low Range Checker...

$17.99 USD

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

HI701-25 Free Chlorine Checker...

$17.99 USD

HI701-25 Free Chlorine Checker...

$17.99 USD

Neptune Systems Apex Trident Water Analyzer With New Reagent Kit

Neptune Systems Apex Trident Water...

$474.99 USD

Neptune Systems Apex Trident Water...

$474.99 USD

Neptune Systems APEX A2 Base Unit.

Neptune Systems APEX A2 Base Unit.

$235.00 USD

Neptune Systems APEX A2 Base Unit.

$235.00 USD

Profilux Mini WiFi-Set Aquarium computer Set/Aquarium Controller * New/READ *

Profilux Mini WiFi-Set Aquarium...

$199.99 USD

Profilux Mini WiFi-Set Aquarium...

$199.99 USD

Neptune Systems 10’ 1 Link Extension Cable

Neptune Systems 10’ 1 Link...

$16.00 USD

Neptune Systems 10’ 1 Link...

$16.00 USD

Duetto 2 Dual-Sensor ATO Aquarium Auto-Top-Off System - XP Aqua

Duetto 2 Dual-Sensor ATO Aquarium...

$124.95 USD

Duetto 2 Dual-Sensor ATO Aquarium...

$124.95 USD

Weipro ET50 ET100 ET200 Ozone Ozonizer Working With Orp Controller Reef Marine

Weipro ET50 ET100 ET200 Ozone...

$49.25 USD

Weipro ET50 ET100 ET200 Ozone...

$49.25 USD

*NEW* AQUATEK Aquarium CO2 Regulator Mini with Integrated COOL TOUCH Solenoid

*NEW* AQUATEK Aquarium CO2 Regulator...

$45.99 USD

*NEW* AQUATEK Aquarium CO2 Regulator...

$45.99 USD

Neptune Systems Apex PMUP v2 Practical Multi-Purpose Utility Pump

Neptune Systems Apex PMUP v2...

$38.99 USD

Neptune Systems Apex PMUP v2...

$38.99 USD

MagTool Aquarium Auto Top Off System MT-Duetto2 ATO Dual Optic

MagTool Aquarium Auto Top Off System...

$42.99 USD

MagTool Aquarium Auto Top Off System...

$42.99 USD

KEYNICE Digital Thermometer, Aquarium Thermometer, Digital Temperature Gauge, Te

KEYNICE Digital Thermometer, Aquarium...

$13.20 USD

KEYNICE Digital Thermometer, Aquarium...

$13.20 USD

Neptune Apex Fusion Classic Aquarium Monitor

Neptune Apex Fusion Classic Aquarium...

$250.00 USD

Neptune Apex Fusion Classic Aquarium...

$250.00 USD

Neptune systems energy bar 8 EB8 For Apex controller (Read Description)

Neptune systems energy bar 8 EB8 For...

$94.99 USD

Neptune systems energy bar 8 EB8 For...

$94.99 USD

Used Neptune Systems Apex Temperature Probe

Used Neptune Systems Apex Temperature...

$21.99 USD

Used Neptune Systems Apex Temperature...

$21.99 USD

HYDROS Control 4 Starter Pack

HYDROS Control 4 Starter Pack

$472.49 USD

HYDROS Control 4 Starter Pack

$472.49 USD

Grow Bro CO2 Generator REFILL KIT For Planted Aquariums organic bio co2

Grow Bro CO2 Generator REFILL KIT ...

$15.99 USD

Grow Bro CO2 Generator REFILL KIT ...

$15.99 USD

DC24 Extension Wire For Neptune APEX

DC24 Extension Wire For Neptune APEX

$13.29 USD

DC24 Extension Wire For Neptune APEX

$13.29 USD

DC 24V to Bare Wire Accessory Cable For Neptune APEX

DC 24V to Bare Wire Accessory Cable...

$13.29 USD

DC 24V to Bare Wire Accessory Cable...

$13.29 USD

Aquarium Thermometer Digital Fish Tank Thermometer Accurate Water Thermometer

Aquarium Thermometer Digital Fish...

$13.29 USD

Aquarium Thermometer Digital Fish...

$13.29 USD

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

Hanna Master Reef Beginner Kit (772...

$339.95 USD

Hanna Master Reef Beginner Kit (772...

$339.95 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

Neptune Systems DDR DOS Dual Dosing...

$189.99 USD

Neptune Systems DDR DOS Dual Dosing...

$189.99 USD

X's 2 Bottles Fritz Zyme Fishless...

$12.99 USD

X's 2 Bottles Fritz Zyme Fishless...

$12.99 USD

LCD Adhesive Strip Flat Thermometer Stick-on For Brew Window Fish Tank Aquarium

LCD Adhesive Strip Flat Thermometer...

$1.80 USD

LCD Adhesive Strip Flat Thermometer...

$1.80 USD

JBJ ATO Automatic Top Off Replacement Float Sensor Switch Fish Tank

JBJ ATO Automatic Top Off Replacement...

$26.59 USD

JBJ ATO Automatic Top Off Replacement...

$26.59 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

Hanna Instrument HI701-25 Free Chlorine Reagent 25 Pcs

Hanna Instrument HI701-25 Free...

$18.99 USD

Hanna Instrument HI701-25 Free...

$18.99 USD

Aquarium Thermometer Rechargeable Digital LED Display Fish Tank Thermometer HD

Aquarium Thermometer Rechargeable...

$9.97 USD

Aquarium Thermometer Rechargeable...

$9.97 USD

Neptune Systems Apex Lab Grade Ph And Orp Probe

Neptune Systems Apex Lab Grade Ph And...

$99.99 USD

Neptune Systems Apex Lab Grade Ph And...

$99.99 USD

Neptune Systems Apex Controller Screen Display Module

Neptune Systems Apex Controller...

$99.99 USD

Neptune Systems Apex Controller...

$99.99 USD

Neptune Systems Apex DOS Dosing Pump And Fluid Metering System Read Description

Neptune Systems Apex DOS Dosing Pump...

$200.00 USD

Neptune Systems Apex DOS Dosing Pump...

$200.00 USD

Neptune® Breakout Box Upgrade

Neptune® Breakout Box Upgrade

$16.49 USD

Neptune® Breakout Box Upgrade

$16.49 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

LCD Aquarium Digital Thermometer for Fish Tank Temperature Gauge Touch Screen

LCD Aquarium Digital Thermometer for...

$12.86 USD

LCD Aquarium Digital Thermometer for...

$12.86 USD

Glass Thermometer Aquarium Fish Tank Water Temperature Meter With Suction Cup

Glass Thermometer Aquarium Fish Tank...

$4.35 CAD

Glass Thermometer Aquarium Fish Tank...

$4.35 CAD

Fish Tank Aquarium Thermometer Glass Mount Suction Cup Floating Temperature

Fish Tank Aquarium Thermometer Glass...

$8.95 USD

Fish Tank Aquarium Thermometer Glass...

$8.95 USD

GHL KH Director & Doser Standalone Pump set (Black)

GHL KH Director & Doser Standalone...

$550.00 USD

GHL KH Director & Doser Standalone...

$550.00 USD

Maxspect ICV6 WiFi Controller Gyre Pumps, LED iOS Android Device Marine FishTank

Maxspect ICV6 WiFi Controller Gyre...

$99.98 USD

Maxspect ICV6 WiFi Controller Gyre...

$99.98 USD

Neptune systems energy bar 8 EB8 For Apex controller Black Label

Neptune systems energy bar 8 EB8 For...

$99.00 USD

Neptune systems energy bar 8 EB8 For...

$99.00 USD

Aquarium Thermometer Digital PAIZOO Fish Tank Accurate LED Display temperature

Aquarium Thermometer Digital PAIZOO...

$19.98 USD

Aquarium Thermometer Digital PAIZOO...

$19.98 USD

Hot Neptune Trident NP Ready To Ship

Hot Neptune Trident NP Ready To Ship

$1,200.00 USD

Hot Neptune Trident NP Ready To Ship

$1,200.00 USD

New Glass Meter Aquarium Fish Tank Water Temperature Thermometer Suction CupYhf

New Glass Meter Aquarium Fish Tank...

$2.28 CAD

New Glass Meter Aquarium Fish Tank...

$2.28 CAD

Tunze 5017 Osmolator ATO Controller Tunze Auto Top Off

Tunze 5017 Osmolator ATO Controller...

$149.99 USD

Tunze 5017 Osmolator ATO Controller...

$149.99 USD

BNIB Neptune DOS and DDR

BNIB Neptune DOS and DDR

$400.00 USD

BNIB Neptune DOS and DDR

$400.00 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

Hanna Instruments HI98107 PH Tester NEW

Hanna Instruments HI98107 PH Tester NEW

$54.99 USD

Hanna Instruments HI98107 PH Tester NEW

$54.99 USD

Digital Aquatics Reef Keeper Power Controller Bar PC4 myReef ReefKeeper Elite

Digital Aquatics Reef Keeper Power...

$45.00 USD

Digital Aquatics Reef Keeper Power...

$45.00 USD

GHL - ProfiLux Doser 2.1, MASTER 4 Dosing Pumps w/ Wi-Fi Controller

GHL - ProfiLux Doser 2.1, MASTER 4...

$385.00 USD

GHL - ProfiLux Doser 2.1, MASTER 4...

$385.00 USD

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

Milwaukee MC122 PRO pH Controller...

$17.40 USD

Milwaukee MC122 PRO pH Controller...

$17.40 USD

AQUANEAT Aquarium Thermometer Digital Fish Tank Temperature 6 PCS

AQUANEAT Aquarium Thermometer Digital...

$17.89 USD

AQUANEAT Aquarium Thermometer Digital...

$17.89 USD

Used Neptune Systems Apex Lab Grade Ph Probe Double Junction

Used Neptune Systems Apex Lab Grade...

$49.99 USD

Used Neptune Systems Apex Lab Grade...

$49.99 USD

Neptune Systems Apex Break Out Box

Neptune Systems Apex Break Out Box

$35.99 USD

Neptune Systems Apex Break Out Box

$35.99 USD

Hanna HI772 Marine Alkalinity Checker HC Alk (Saltwater) - Hanna Instruments NEW

Hanna HI772 Marine Alkalinity Checker...

$64.99 USD

Hanna HI772 Marine Alkalinity Checker...

$64.99 USD

Neptune System Probes

Neptune System Probes

$50.00 USD

Neptune System Probes

$50.00 USD

Aquarium Thermometer Digital Fish Tank Thermometer Accurate Water USA

Aquarium Thermometer Digital Fish...

$10.97 USD

Aquarium Thermometer Digital Fish...

$10.97 USD

Neptune System Pm2 Salinity Module

Neptune System Pm2 Salinity Module

$65.00 USD

Neptune System Pm2 Salinity Module

$65.00 USD

GHL Doser Maxi

$300.00 USD

$300.00 USD

Neptune DŌS - Fluid Metering System I have 2 left each in working condition

Neptune DŌS - Fluid Metering System...

$175.00 USD

Neptune DŌS - Fluid Metering System...

$175.00 USD

neptune system Apex & Trident

neptune system Apex & Trident

$900.00 USD

neptune system Apex & Trident

$900.00 USD

Aquarium Test Probe Holder for Apex Neptune Reef

Aquarium Test Probe Holder for Apex...

$19.54 USD

Aquarium Test Probe Holder for Apex...

$19.54 USD

Neptune Apex Trident, Source Tube Winder, Tidier, 3D Printed

Neptune Apex Trident, Source Tube...

$14.99 USD

Neptune Apex Trident, Source Tube...

$14.99 USD

New Neptune Systems Apex Fluid Monitoring Module FMM

New Neptune Systems Apex Fluid...

$79.00 USD

New Neptune Systems Apex Fluid...

$79.00 USD