Meters & Controllers | Surplus Network

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

USA

1 Aquarium Fish Tank Thermometer Temp...

$1.99 USD

1 Aquarium Fish Tank Thermometer Temp...

$1.99 USD

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

USA

Aquarium Fish Tank Thermometer Temp...

$1.99 USD

Aquarium Fish Tank Thermometer Temp...

$1.99 USD

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

USA

LCD Adhesive Strip Flat Thermometer...

$1.99 USD

LCD Adhesive Strip Flat Thermometer...

$1.99 USD

Tunze 3155 Osmolator Universal Auto Top Off With Everything

USA

Tunze 3155 Osmolator Universal Auto...

$90.00 USD

Tunze 3155 Osmolator Universal Auto...

$90.00 USD

Tunze 3155 Osmolator Universal Auto Top Off With Everything

USA

Tunze 3155 Osmolator Universal Auto...

$90.00 USD

Tunze 3155 Osmolator Universal Auto...

$90.00 USD

Aquarium Digital Thermometer Fish Tank Salt Water Terrarium

USA

Aquarium Digital Thermometer Fish...

$6.29 USD

Aquarium Digital Thermometer Fish...

$6.29 USD

Neptune Systems Apex Lab Grade Salinity - Conductivity Probe

USA

Neptune Systems Apex Lab Grade...

$139.00 USD

Neptune Systems Apex Lab Grade...

$139.00 USD

Used Neptune Systems APEX A3 Pro Base Unit

USA

Used Neptune Systems APEX A3 Pro Base...

$315.00 USD

Used Neptune Systems APEX A3 Pro Base...

$315.00 USD

coralvue hydros X4 Pro Controller

USA

coralvue hydros X4 Pro Controller

$610.00 USD

coralvue hydros X4 Pro Controller

$610.00 USD

Dual Fish Tank Aquarium Thermometer Temperature Sticker Celsius Fahrenheit °C

USA

Dual Fish Tank Aquarium Thermometer...

$1.95 USD

Dual Fish Tank Aquarium Thermometer...

$1.95 USD

AQUANEAT 2 Pack Aquarium Thermometer Digital Reptile Fish Tank Water Temperature

USA

AQUANEAT 2 Pack Aquarium Thermometer...

$8.99 USD

AQUANEAT 2 Pack Aquarium Thermometer...

$8.99 USD

2pcs Digital LCD Fish Tank Aquarium Marine Water Thermometer Temperature Black

USA

2pcs Digital LCD Fish Tank Aquarium...

$8.99 USD

2pcs Digital LCD Fish Tank Aquarium...

$8.99 USD

2xAquarium Digital Thermometer LED Fish Tank Temperature Gauge with Touch Screen

USA

2xAquarium Digital Thermometer LED...

$12.85 USD

2xAquarium Digital Thermometer LED...

$12.85 USD

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

USA

JW Pet Fusion Smart Temp ...

$8.27 USD

JW Pet Fusion Smart Temp ...

$8.27 USD

Neptune Systems Apex MXM Module For Ecotech Marine

USA

Neptune Systems Apex MXM Module For...

$84.99 USD

Neptune Systems Apex MXM Module For...

$84.99 USD

AQUANEAT Aquarium Thermometer Digital Fish Tank Temperature 6 PCS

USA

AQUANEAT Aquarium Thermometer Digital...

$17.89 USD

AQUANEAT Aquarium Thermometer Digital...

$17.89 USD

Smart Ph Orp Controller

USA

Smart Ph Orp Controller

$37.19 USD

Smart Ph Orp Controller

$37.19 USD

JW Pet Fusion Smart Temp Magnet Style Aquarium Thermometer

USA

JW Pet Fusion Smart Temp Magnet Style...

$7.25 USD

JW Pet Fusion Smart Temp Magnet Style...

$7.25 USD

Neptune Systems Apex DOS Dosing & Fluid Metering System FOR PARTS ONLY

USA

Neptune Systems Apex DOS Dosing &...

$80.00 USD

Neptune Systems Apex DOS Dosing &...

$80.00 USD

Aquarium Digital Thermometer for Fish Tank Temperature Gauge New

USA

Aquarium Digital Thermometer for Fish...

$9.98 USD

Aquarium Digital Thermometer for Fish...

$9.98 USD

Sandpoint Pinpoint ORP PH Aquarium Controller Monitor W/ CO2 Regulator

USA

Sandpoint Pinpoint ORP PH Aquarium...

$56.24 USD

Sandpoint Pinpoint ORP PH Aquarium...

$56.24 USD

Digital LCD Display Thermometer Aquarium Fish-Tank Temperature Water

China

Digital LCD Display Thermometer...

$2.14 USD

Digital LCD Display Thermometer...

$2.14 USD

Digital LCD Aquarium Thermometer Waterproof Fish Tank Temperature Sensor US

USA

Digital LCD Aquarium Thermometer...

$4.99 USD

Digital LCD Aquarium Thermometer...

$4.99 USD

IceCap Dual Optical ATO - Auto Top off Controller

USA

IceCap Dual Optical ATO - Auto Top...

$65.00 USD

IceCap Dual Optical ATO - Auto Top...

$65.00 USD

slightly used Auto Top Off ATO - Reef Breeders

USA

slightly used Auto Top Off ATO - Reef...

$50.00 USD

slightly used Auto Top Off ATO - Reef...

$50.00 USD

Used Neptune Systems Apex Temperature Probe Temp

USA

Used Neptune Systems Apex Temperature...

$24.99 USD

Used Neptune Systems Apex Temperature...

$24.99 USD

2PCS Aquarium Digital Thermometer LED Fish Tank Temperature Gauge Touch Screen

USA

2PCS Aquarium Digital Thermometer LED...

$9.44 USD

2PCS Aquarium Digital Thermometer LED...

$9.44 USD

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

USA

*NEW* AQUATEK Aquarium CO2 Regulator...

$45.99 USD

*NEW* AQUATEK Aquarium CO2 Regulator...

$45.99 USD

Used Neptune Systems Apex Energy Bar 832 EB832

USA

Used Neptune Systems Apex Energy Bar...

$229.99 USD

Used Neptune Systems Apex Energy Bar...

$229.99 USD

Neptune Atk FMM Module - No Power Cord

USA

Neptune Atk FMM Module - No Power Cord

$55.00 USD

Neptune Atk FMM Module - No Power Cord

$55.00 USD

Coralvue HYDROS IV

USA

Coralvue HYDROS IV

$60.00 USD

Coralvue HYDROS IV

$60.00 USD

Kessil Spectral Controller New in box

USA

Kessil Spectral Controller New in box

$60.00 USD

Kessil Spectral Controller New in box

$60.00 USD

GrowBro CO2 Generator REFILL KIT Grow Box Cabinets Bucket Bag PC Hydroponic

USA

GrowBro CO2 Generator REFILL KIT Grow...

$15.99 USD

GrowBro CO2 Generator REFILL KIT Grow...

$15.99 USD

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

USA

KEYNICE Digital Thermometer, Aquarium...

$15.99 USD

KEYNICE Digital Thermometer, Aquarium...

$15.99 USD

Neptune Apex Full System - Save Money Now

USA

Neptune Apex Full System - Save Money...

$2,500.00 USD

Neptune Apex Full System - Save Money...

$2,500.00 USD

Neptune System

USA

Neptune System

$10.95 USD

Neptune System

$10.95 USD

GHL KH Director & Doser Standalone set “WHITE” PLEASE READ DESCRIPTION!!!

USA

GHL KH Director & Doser Standalone...

$650.00 USD

GHL KH Director & Doser Standalone...

$650.00 USD

Neptune Apex NG Base Unit With Energy Bar 832 Slid Surface Leak Detection Probe

USA

Neptune Apex NG Base Unit With Energy...

$349.98 USD

Neptune Apex NG Base Unit With Energy...

$349.98 USD

GHL Profilux 4 Aquarium Controller

USA

GHL Profilux 4 Aquarium Controller

$349.98 USD

GHL Profilux 4 Aquarium Controller

$349.98 USD

Neptune Systems APEX A2 Base Unit.

USA

Neptune Systems APEX A2 Base Unit.

$239.99 USD

Neptune Systems APEX A2 Base Unit.

$239.99 USD

Neptune Systems Trident Marine Aquarium Water Analyzer Reef Tank Tester Apex

USA

Neptune Systems Trident Marine...

$465.00 USD

Neptune Systems Trident Marine...

$465.00 USD

Hanna Pocket Photometer Phosphate Checker HI713

USA

Hanna Pocket Photometer Phosphate...

$67.99 USD

Hanna Pocket Photometer Phosphate...

$67.99 USD

Hanna Checker Marine Alkalinity HI755

USA

Hanna Checker Marine Alkalinity HI755

$67.99 USD

Hanna Checker Marine Alkalinity HI755

$67.99 USD

Used Neptune Systems Apex PM3 Module With Dissolved Oxygen Sensor Oxyguard

USA

Used Neptune Systems Apex PM3 Module...

$499.99 USD

Used Neptune Systems Apex PM3 Module...

$499.99 USD

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

USA

5pcs Fish Tank Aquarium Thermometer...

$11.69 USD

5pcs Fish Tank Aquarium Thermometer...

$11.69 USD

Imagitarium Hydrometer with Thermometer for Saltwater New Sealed

USA

Imagitarium Hydrometer with...

$9.99 USD

Imagitarium Hydrometer with...

$9.99 USD

1-3 fish tank aquarium thermometer glass mount suction cup floating temperature

USA

1-3 fish tank aquarium thermometer...

$9.99 USD

1-3 fish tank aquarium thermometer...

$9.99 USD

Neptune Systems Apex Trident Water Analyzer With New Reagent Kit

USA

Neptune Systems Apex Trident Water...

$474.99 USD

Neptune Systems Apex Trident Water...

$474.99 USD

Neptune Optical Sensor

USA

Neptune Optical Sensor

$20.00 USD

Neptune Optical Sensor

$20.00 USD

2 Channel Apex to Light dimming Cable - Custom Made Possibly

USA

2 Channel Apex to Light dimming Cable...

$20.00 USD

2 Channel Apex to Light dimming Cable...

$20.00 USD

Aquarium Thermometer Rechargeable Digital LED Display Fish Tank Thermometer HD M

USA

Aquarium Thermometer Rechargeable...

$9.88 USD

Aquarium Thermometer Rechargeable...

$9.88 USD

Neptune Systems Apex DDR Dual Dosing Reservoir

USA

Neptune Systems Apex DDR Dual Dosing...

$124.99 USD

Neptune Systems Apex DDR Dual Dosing...

$124.99 USD

New (Open Box) Neptune Apex Trident with 1 Link Cable And Reagents

USA

New (Open Box) Neptune Apex Trident...

$480.00 USD

New (Open Box) Neptune Apex Trident...

$480.00 USD

Neptune Systems Apex DOS Dosing & Fluid Metering System w/ Power Adapter & USB

USA

Neptune Systems Apex DOS Dosing &...

$209.99 USD

Neptune Systems Apex DOS Dosing &...

$209.99 USD

JW Pet Fusion Smart Temp Weighted Aquarium Thermometer

USA

JW Pet Fusion Smart Temp Weighted...

$6.50 USD

JW Pet Fusion Smart Temp Weighted...

$6.50 USD

ProfiLux Mini WiFi Aquarium Controller Set w/Powerbar - Black

USA

ProfiLux Mini WiFi Aquarium...

$100.00 USD

ProfiLux Mini WiFi Aquarium...

$100.00 USD

SpectraPure G7 LiterMeter Stand Alone Basic Auto Top Off - LM -APM-G7

USA

SpectraPure G7 LiterMeter Stand Alone...

$200.00 USD

SpectraPure G7 LiterMeter Stand Alone...

$200.00 USD

neptune systems dos

USA

neptune systems dos

$200.00 USD

neptune systems dos

$200.00 USD

Neptune Systems APEX ALD Module Leak Detector

USA

Neptune Systems APEX ALD Module Leak...

$34.99 USD

Neptune Systems APEX ALD Module Leak...

$34.99 USD

Smart Magnetic Stirir for Testing - AutoAqua

USA

Smart Magnetic Stirir for Testing -...

$32.99 USD

Smart Magnetic Stirir for Testing -...

$32.99 USD

Neptune Systems Apex MPR Magnetic Probe Holder Rack White

USA

Neptune Systems Apex MPR Magnetic...

$34.95 USD

Neptune Systems Apex MPR Magnetic...

$34.95 USD

Osmolator 3155 Auto Top Off - Tunze (Missing Controller, Pump, Clamp)

USA

Osmolator 3155 Auto Top Off - Tunze...

$34.95 USD

Osmolator 3155 Auto Top Off - Tunze...

$34.95 USD

HM Digital pH Electrode Storage Solution (60cc)

USA

HM Digital pH Electrode Storage...

$9.95 USD

HM Digital pH Electrode Storage...

$9.95 USD

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

USA

Fish Tank Thermometer High-precision...

$8.44 USD

Fish Tank Thermometer High-precision...

$8.44 USD

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

China

auto water filler, Top off system,...

$11.99 USD

auto water filler, Top off system,...

$11.99 USD

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

USA

Hanna Master Reef Beginner Kit (772...

$339.95 USD

Hanna Master Reef Beginner Kit (772...

$339.95 USD

Hanna Core Parameters Kit (772 Alk, 758 Calcium, 783 Magnesium) Checker HC (Salt

USA

Hanna Core Parameters Kit (772 Alk,...

$203.97 USD

Hanna Core Parameters Kit (772 Alk,...

$203.97 USD

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

USA

Dual Aquarium Fish Tank Thermometer...

$6.66 USD

Dual Aquarium Fish Tank Thermometer...

$6.66 USD

Neptune Trident Six-Month Reagent Kit

USA

Neptune Trident Six-Month Reagent Kit

$109.99 USD

Neptune Trident Six-Month Reagent Kit

$109.99 USD

Neptune Systems Apex Lab Grade Ph And Orp Probe

USA

Neptune Systems Apex Lab Grade Ph And...

$99.99 USD

Neptune Systems Apex Lab Grade Ph And...

$99.99 USD

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

USA

Fish Tank Thermometer Temp Sticker ...

$2.05 USD

Fish Tank Thermometer Temp Sticker ...

$2.05 USD

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

USA

One Aquarium Thermometer Temp Sticker...

$2.05 USD

One Aquarium Thermometer Temp Sticker...

$2.05 USD

Apex Neptune Systems PM2 Salinity / Conductivity Module Orange Label

USA

Apex Neptune Systems PM2 Salinity /...

$79.99 USD

Apex Neptune Systems PM2 Salinity /...

$79.99 USD

Milwaukee MA911B/2 Double Junction pH Electrode with Extended Cable

USA

Milwaukee MA911B/2 Double Junction pH...

$40.51 USD

Milwaukee MA911B/2 Double Junction pH...

$40.51 USD

Kessil to Neptune Apex Control Cable

USA

Kessil to Neptune Apex Control Cable

$15.00 USD

Kessil to Neptune Apex Control Cable

$15.00 USD

LOOP Mini Bluetooth Controller w/ Battery Backup (1695) - Current USA

USA

LOOP Mini Bluetooth Controller w/...

$56.95 USD

LOOP Mini Bluetooth Controller w/...

$56.95 USD

Coral blue HYDROS Control X2 Starter Pack Kit WiFi Bar

USA

Coral blue HYDROS Control X2 Starter...

$199.00 USD

Coral blue HYDROS Control X2 Starter...

$199.00 USD

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

USA

Dual Aquarium Fish Tank Thermometer...

$2.41 USD

Dual Aquarium Fish Tank Thermometer...

$2.41 USD

Hanna HI98107 Checker - Handheld Waterproof Pocket pH Tester

USA

Hanna HI98107 Checker - Handheld...

$49.99 USD

Hanna HI98107 Checker - Handheld...

$49.99 USD

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

USA

HI713-25 Phosphate Low Range Checker...

$17.99 USD

HI713-25 Phosphate Low Range Checker...

$17.99 USD

Aquarium Test Probe Holder for Apex Neptune Reef

USA

Aquarium Test Probe Holder for Apex...

$22.99 USD

Aquarium Test Probe Holder for Apex...

$22.99 USD

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

USA

PH Probe Meter Sensor BNC Connector...

$11.97 USD

PH Probe Meter Sensor BNC Connector...

$11.97 USD

Milwaukee Instruments PH600AQ Ph Tester With 1 Point Manual Calibration

USA

Milwaukee Instruments PH600AQ Ph...

$23.65 USD

Milwaukee Instruments PH600AQ Ph...

$23.65 USD

Milwaukee Instruments SMS122 PH Controller w/ PH Smart monitoring system

USA

Milwaukee Instruments SMS122 PH...

$40.00 USD

Milwaukee Instruments SMS122 PH...

$40.00 USD

GHL KH Director & Doser 2.1 Pump set With Probe & Cords For Reef Tank

USA

GHL KH Director & Doser 2.1 Pump set...

$449.99 USD

GHL KH Director & Doser 2.1 Pump set...

$449.99 USD

Aquarium Temperature Gauge LCD Thermometer For Fish Tank T110 TPM-10 2m

USA

Aquarium Temperature Gauge LCD...

$7.24 USD

Aquarium Temperature Gauge LCD...

$7.24 USD

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

China

Acryli Liquid Storage Bucket dosing...

$19.99 USD

Acryli Liquid Storage Bucket dosing...

$19.99 USD

Hanna Checker Marine Alkalinity reagents (25)

USA

Hanna Checker Marine Alkalinity...

$19.99 USD

Hanna Checker Marine Alkalinity...

$19.99 USD

Aquarium Thermometer Fish Tank Water Terrarium Temperature- 2 Pack

USA

Aquarium Thermometer Fish Tank Water...

$7.12 USD

Aquarium Thermometer Fish Tank Water...

$7.12 USD

Neptune Systems Apex Classic Controller (New No Box) Aquarium Controller

USA

Neptune Systems Apex Classic...

$345.00 USD

Neptune Systems Apex Classic...

$345.00 USD

Seneye USB Reef Aquarium Monitor / Par Meter - Meter Only - Barely Used

USA

Seneye USB Reef Aquarium Monitor /...

$149.99 USD

Seneye USB Reef Aquarium Monitor /...

$149.99 USD

JBJ ATO Automatic Top Off Replacement Float Sensor Switch Fish Tank

USA

JBJ ATO Automatic Top Off Replacement...

$26.59 USD

JBJ ATO Automatic Top Off Replacement...

$26.59 USD

Hikari AccuProbe Aquarium Calibrated Hydrometer

USA

Hikari AccuProbe Aquarium Calibrated...

$13.94 USD

Hikari AccuProbe Aquarium Calibrated...

$13.94 USD

Oase Digital Thermometer

USA

Oase Digital Thermometer

$18.00 USD

Oase Digital Thermometer

$18.00 USD

AQUANEAT 6 PCS Aquarium Thermometer Strips, Fish Tank Thermometer Sticker

USA

AQUANEAT 6 PCS Aquarium Thermometer...

$7.99 USD

AQUANEAT 6 PCS Aquarium Thermometer...

$7.99 USD

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

USA

Profilux Mini WiFi-Set Aquarium...

$199.99 USD

Profilux Mini WiFi-Set Aquarium...

$199.99 USD

Neptune Systems Apex VDM Module LED & Pump Control.

USA

Neptune Systems Apex VDM Module LED &...

$74.99 USD

Neptune Systems Apex VDM Module LED &...

$74.99 USD

Neptune Systems Apex PM1 pH/ORP Probe Module

USA

Neptune Systems Apex PM1 pH/ORP Probe...

$74.99 USD

Neptune Systems Apex PM1 pH/ORP Probe...

$74.99 USD

Neptune Systems Flow Sensor - 1" with unions

USA

Neptune Systems Flow Sensor - 1" with...

$65.99 USD

Neptune Systems Flow Sensor - 1" with...

$65.99 USD

Oase Digital Thermometer

USA

Oase Digital Thermometer

$20.49 USD

Oase Digital Thermometer

$20.49 USD