Skip to main content
Hi
!
Hi!
Sign in
or
register
Help & Contact
Sell
Watchlist
Expand Watch List
My eBay
Expand My eBay
Summary
Recently Viewed
Bids/Offers
Watchlist
Purchase History
Selling
Saved feed
Saved Searches
Saved Sellers
Messages
Expand Notifications
Please
sign-in
to view notifications.
Expand Cart
Loading...
eBay Home
Shop by category
Enter your search keyword
All Categories
Search
Advanced
Aquarium Meters & Controllers
Shop by Water Type
Marine
All Water Types
Fresh
Pond
Shop by Measured/Controlled Parameter
Temperature
Oxygen
Light Intensity
pH Level
Redox Potential
Salinity
Browse by Brand
Aqua Medic
Blue Ribbon
Coralife
Digital Aquatics
EHEIM
Eshopps
Fluval
Hagen
Hikari
Hydor
Marineland
Neptune
Neptune Systems
Penn-Plax
Red Sea
Seachem
Tunze
Unbranded
Zoo Med
More to explore
Neptune Apex
Ph Controller
Water Level Controller In Aquarium Meters & Controllers
breadcrumb
eBay
Pet Supplies
Fish & Aquariums
Meters & Controllers
Shop by category
Fish & Aquariums
Meters & Controllers
Air Stones
Algae Repellent
Aquariums & Tanks
CO2 Equipment
Cleaning & Maintenance
Coral & Live Rock
Decorations
Feeders
Filter Media & Accessories
Filters
Fish Pond Supplies
Food
Gravel & Substrate
Health Care
Heaters & Chillers
Lighting & Bulbs
Live Fish
Live Invertebrates
Live Plants
Other Fish & Aquarium Supplies
Pumps (Air)
Pumps (Water)
Reverse Osmosis & Deionization
Tubing & Valves
UV Sterilizers
Water Tests & Treatment
More
View more categories
All Listings
Auction
Buy It Now
Sort: Best Match
Best Match
Time: ending soonest
Time: newly listed
Price + Shipping: lowest first
Price + Shipping: highest first
Distance: nearest first
List View
Gallery View
8,372 results
Sort: Best Match
Best Match
Time: ending soonest
Time: newly listed
Price + Shipping: lowest first
Price + Shipping: highest first
Distance: nearest first
Filter
Type
Thermometer
Controller
Hydrometer
pH Electrode
Refractometer
Not Specified
Water Type
All Water Types
Marine
Fresh
Pond
Not Specified
Measured/Controlled Parameter
Temperature
Salinity
pH Level
Waves
Redox Potential
Light Intensity
Oxygen
TDS/Conductivity
Not Specified
Analog/Digital
Analog
Digital
Analog & Digital
Not Specified
Tank Capacity
0.7 gal.
1 gal.
3 gal.
5 gal.
10 gal.
15 gal.
20 gal.
25 gal.
30 gal.
45 gal.
50 gal.
55 gal.
65 gal.
75 gal.
100 gal.
200 gal.
Not Specified
Condition
New
Used
Price
Under S$ 10
S$ 10 to S$ 19
Over S$ 19
All Filters
Auto Top Off 12v + Pump or Solenoid Valve Reef Aquarium Float Switch ATO System
Brand New
S$ 77.31
S$ 31.46 shipping
11 watching
Customizable Apex Neptune Breakout Box 6 switches Many Colors Available
Brand New
S$ 47.79
Was:
S$ 56.22
was - S$ 56.22
or Best Offer
S$ 30.59 shipping
Aquarium Test Probe Holder for Apex Neptune Reef
Brand New
S$ 27.47
Was:
S$ 32.32
was - S$ 32.32
or Best Offer
S$ 25.29 shipping
84 watching
Customizable Apex Neptune Breakout Box 4 switches 2 push release connectors
Brand New
S$ 47.79
Was:
S$ 56.22
was - S$ 56.22
or Best Offer
S$ 29.68 shipping
New Listing
HM Digital COM-300 Waterproof Professional Series pH/EC/TDS/Temp Meter
Brand New
S$ 145.58
or Best Offer
S$ 45.47 shipping
Acryli Liquid Storage Bucket dosing pump Auto Top Off System Reservoir Container
Brand New
S$ 28.10
to
S$ 84.34
Free shipping
Neptune Systems A3 Apex System
Brand New
·
Neptune Systems
S$ 812.56
S$ 103.83 shipping
2 watching
Tunze Osmolator 3 Nano
Brand New
·
Tunze
S$ 182.75
S$ 84.84 shipping
New Listing
Reliable Pet Thermometer with Memory Function Professional for Pet Thermometer
Brand New
·
Unbranded
S$ 11.01
Free shipping
New Listing
10 Pieces Sticker Temperature Thermometer On Strips for Brewing Wine Beer
Brand New
·
Unbranded
S$ 10.75
Free shipping
New Listing
On Thermometer Strip Digital Temperature Display for Aquarium Fish for Tan
Brand New
·
Unbranded
S$ 7.49
Free shipping
New Listing
Fishtank Water Electronic Temperature Meter for Fishtank Mini Size
Brand New
·
Unbranded
S$ 9.12
Free shipping
Neptune Systems Apex Trident Water Analyzer With New Reagent Kit Brand New
Brand New
·
Neptune Systems
S$ 773.87
S$ 116.68 shipping
Only 1 left!
Magnetic 4 Probe Holder 3 Standard 1 Enlarged for Apex Neptune Temperature Probe
Brand New
S$ 33.45
Was:
S$ 39.35
was - S$ 39.35
or Best Offer
S$ 29.26 shipping
146 sold
Neptune Apex Breakout Box DC Jacks w/ 6 cable leads included Hidden Mounting
Brand New
S$ 43.01
Was:
S$ 50.60
was - S$ 50.60
or Best Offer
S$ 29.54 shipping
66 watching
1X Glass Meter Aquarium Fish Tank Water Temperature Thermometer Suction Cup
Brand New
·
Unbranded
S$ 3.31
or Best Offer
Free shipping
8 watching
New Listing
Thermometers Sticker Adhesive Thermometers Strips Display Temperature in Degrees
Brand New
·
Unbranded
S$ 7.52
Free shipping
HANNA HANNA HI9146-04 Smart Buy
Brand New
S$ 281.16
or Best Offer
S$ 37.48 shipping
Only 1 left!
1X Glass Thermometer Aquarium Fish Tank Water Temperature Meter + Suction Cup
Brand New
·
Unbranded
S$ 2.67
or Best Offer
Free shipping
New Listing
1pcs Aquarium Fish Tank Temperature Sensor Gauge Digital Thermometer Sale
Brand New
·
Unbranded
S$ 9.22
to
S$ 9.75
Free shipping
Aquarium Digital Black Thermometer Stick on LED Fish Tank -Dry Battery Long Life
Brand New
S$ 14.84
to
S$ 25.86
S$ 14.84 shipping
New Listing
Sticker Temperature Thermometer Digital Display Strips 64-93°F 18-34°C
Brand New
·
Unbranded
S$ 7.52
Free shipping
New Listing
CO2 Needle for Valve For System Guage Pressure Diffuser DIY Planted Aquarium 2 T
Brand New
·
Unbranded
S$ 14.67
Free shipping
Neptune Systems Apex FMM Fluid Monitoring Module w/ AquaBus USB Cable BRAND NEW
Brand New
·
Neptune Systems
S$ 140.57
S$ 33.33 shipping
New Listing
Water Level Controller Water Filler Auto Aquarium Water Changer with Float for V
Brand New
·
Unbranded
S$ 15.25
Free shipping
New Listing
Thermometer Adhesive Sticker Temperature Gauge Aquarium Window Tank NEW F9I1
Brand New
·
Unbranded
S$ 5.19
to
S$ 5.38
Free shipping
Aquarium Fish Tank Thermometer Glass Meter Water Temperature Gauge Suction Cup
Brand New
·
Unbranded
S$ 7.45
or Best Offer
S$ 1.10 shipping
11 watching
New Listing
Aquarium Glass Thermometer With Hook Fish for Tank Reptile Box Accessories Suppl
Brand New
·
Unbranded
S$ 8.77
Free shipping
2x Covered Toggle 4x Push switch Apex Neptune breakout box with 24VDC alarm.
Brand New
S$ 149.37
Was:
S$ 175.74
was - S$ 175.74
S$ 46.10 shipping
33 watching
Neptune Apex Breakout Box Push Terminals Slim Design Hidden Mounting Bracket
Brand New
S$ 33.45
Was:
S$ 39.35
was - S$ 39.35
or Best Offer
S$ 30.17 shipping
Neptune Apex I/O Breakout Box Six Push Terminals Integrated Mounting Bracket
Brand New
S$ 35.13
S$ 30.23 shipping
DIY DC24 Male ONLY to bare wires 2 Pin Extension 5 foot for Neptune Systems Apex
Brand New
S$ 15.52
Was:
S$ 18.26
was - S$ 18.26
S$ 29.65 shipping
61 sold
New Listing
Upgrade Mini Float for Valve for Water for Tank Tower Cattle Watering Drought
Brand New
·
Unbranded
S$ 14.75
Free shipping
Coralvue HYDROS Control X10 Controller & Dosing System New NIB OPEN BOX
Brand New
S$ 935.11
or Best Offer
S$ 38.18 shipping
Fish Tank Tropical Aquarium Thermometer Floating Tempered EasyRead₪ Glass M3C7
Brand New
·
Unbranded
S$ 4.18
or Best Offer
Free shipping
New Listing
PH Electrode Probe BNC Connector 0-14 for PH Controller Water Quality Sensor
Brand New
·
Unbranded
S$ 18.90
Free shipping
New Listing
Aquarium Temperature Thermometer Glass Fish Tank Sticker Peel Digital New~
Brand New
·
Unbranded
S$ 5.30
or Best Offer
Free shipping
REEFER Skimmer 600 ReefRun DC Pump Upgrade Kit (Excl. controller) - Red Sea
Brand New
·
Red Sea
S$ 279.77
S$ 80.05 shipping
New Listing
Marineland Precision Heater for Saltwater or Freshwater Aquariums 75-watt
Brand New
·
Marineland
S$ 49.19
or Best Offer
S$ 29.72 shipping
Auto Top Off Dual Float Switch Sensor ATO Water Level Controller 4 Reef Aquarium
Brand New
S$ 63.25
S$ 30.14 shipping
25 watching
New Listing
Stick-on Digital Aquarium Fish Tank Fridge Thermometer New Sticker G2C9
Brand New
·
Unbranded
S$ 5.23
or Best Offer
Free shipping
New Listing
Fish Tank Tropical Aquarium Thermometer Floating Tempered Sucker❀ Read F4D0
Brand New
·
Unbranded
S$ 10.73
or Best Offer
Free shipping
Focustronic Alkatronic Professional Pro Alkalinity Controller [ Brand New ]
Brand New
S$ 928.64
Was:
S$ 1,031.83
was - S$ 1,031.83
S$ 54.17 shipping
auto water filler, Top off system, aquarium ATO sytem, water level controller
Brand New
S$ 16.86
Free shipping
128 watching
Elegant LCD Digital Thermometer for Aquatic Environments and Terrariums
Brand New
·
Unbranded
S$ 9.11
Free shipping
New Listing
Aquarium Electronic Precision Fish for Tank Temperature Measuring Tool with Prob
Brand New
·
Unbranded
S$ 10.79
Free shipping
New Listing
Horizontal On Thermometer Strip Horizontal Thermometer Stickers Digital
Brand New
·
Unbranded
S$ 14.64
Free shipping
Weipro PH probe electrode BNC socket 1.5 meters cable, high accuracy,NIB
Brand New
S$ 56.22
Free shipping
5 x LCD Thermometer Temperature Adhesive Sticker Sticky Strip Aquarium Fish Tank
Brand New
·
Unbranded
S$ 9.32
S$ 2.78 shipping
275 sold
New Listing
Aquarium Thermometer Digital Fish for Tank Submersible Thermometers with Suction
Brand New
·
Unbranded
S$ 8.74
Free shipping
New Listing
Aquarium Thermometer Sticker Adhesive Stickers Fish for Tank Temperature Monitor
Brand New
·
Unbranded
S$ 7.41
Free shipping
3 x LCD Thermometer Adhesive Sticker Temperature Gauge Aquarium Window Fish Tank
Brand New
·
Unbranded
S$ 6.52
S$ 2.78 shipping
1,501 sold
Thermometer Adhesive Sticker Black LCD Flat Strip Window Fish Tank Aquarium
Brand New
S$ 4.01
to
S$ 22.31
S$ 14.84 shipping
New Listing
PH Electrode Probe ABS Material 5 Meters High Accuracy Exquisite Craftsmans LS
Brand New
·
Unbranded
S$ 45.55
or Best Offer
S$ 7.45 shipping
Neptune Systems Double Trident Stand
Brand New
S$ 42.82
or Best Offer
S$ 39.96 shipping
New Listing
Aquarium Fish Tank Temperature Sensor Gauge Digital New Thermometer ❁UK
Brand New
S$ 9.65
to
S$ 9.91
Free shipping
Neptune PM2 Module - conductivity, temperature, and 6 digital inputs
Brand New
·
Neptune Systems
S$ 133.54
S$ 33.12 shipping
New Listing
Automatic Water Replenisher Fish for Tank Water Filler Accessories Easy to
Brand New
·
Unbranded
S$ 9.47
Free shipping
Neptune systems temperature probe and dosing tube
Brand New
·
Neptune Systems
S$ 76.48
or Best Offer
S$ 25.49 shipping
Neptune Apex A3/A3 Pro Probe Holder 3-Pack | Fits 1mm-11.5mm Glass | Reef Tank
Brand New
·
Neptune
S$ 20.30
Was:
S$ 23.89
was - S$ 23.89
S$ 35.08 shipping
Results Pagination - Page 1
1
2
3
4
5
6
7
8
9
10
