Aquarium Meters & Controllers
Best Selling
- (HI784) Marine Ammonia Checker Handheld Colorimeter (Saltwater) - Hanna Instrume$45.00 New$35.00 Used
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3,323 Results
*NEW* AQUATEK Aquarium CO2 Regulator Mini with Integrated COOL TOUCH Solenoid
COOL TOUCH and QUIET OPERATION SOLENOID! ON SALE NOW!!$45.994,148 soldMagnetic 4 Probe Holder 3 Standard 1 Enlarged for Apex Neptune Temperature Probe
$22.39Was: $27.99or Best OfferFree shippingJW Pet Fusion Smart Temp Magnet Style Aquarium Thermometer
$6.75Free shippingAquarium Fish Tank Thermometer Temp Sticker Stick on **FAHRENHEIT IN BOLD!**
$1.99 to $4.99Free shipping366 soldFish Tank Aquarium Thermometer Temperature Sticker Celsius Fahrenheit °C ℉
$1.65or Best OfferFree shippingAquarium Digital Thermometer Fish Tank Salt Water Terrarium
$6.29 to $16.99Free shippingNeptune Systems Apex A2 Base Unit w/ Probes & Magnetic Probe Holder
$379.99Free shippingLCD Aquarium Digital Thermometer for Fish Tank Temperature Gauge Touch Screen
$9.98 to $13.22Was: $11.09Free shippingCO2 Generator System For Planted Aquariums To 40 Gallons Organic Bio Safe
$18.99or Best OfferFree shipping86 sold2x Covered Toggle 4x Push switch Apex Neptune breakout box with 24VDC alarm.
$100.00Was: $125.00Free shippingReef Keeper Lite Aquarium Controller - Digital Aquatics
$150.00or Best Offer$11.70 shipping1 Aquarium Fish Tank Thermometer Temp Sticker Stick On **FAHRENHEIT IN BOLD!**
$1.99Free shipping4,795 soldNeptune® Breakout Box Smart Dosing Container
$61.99$4.43 shippingNeptune System
$8.99 to $945.99Free shippingNew ListingNeptune Apex A2 Controller
$150.001 bid$12.99 shippingEnding Saturday at 4:30PM PDT6d 1hOsmolator Nano 3152 Auto Top Off - Tunze With Pump
$59.00$11.60 shippingHanna Instruments HI758U Marine Calcium Checker Colorimeter Open Box
$50.00Free shippingAcryli Liquid Storage Bucket dosing pump Auto Top Off System Reservoir Container
$19.99 to $59.99Free shippingReef Keeper Lite Aquarium Controller
$175.00or Best Offer$8.82 shippingNeptune Apex JR NEW
$225.000 bidsor Best OfferEnding May 20 at 11:36AM PDT7d 20h$6.26 shippingCustomizable Apex Neptune Breakout Box 2x Lighted Toggle Switches Push Terminal
$59.99Was: $74.99or Best OfferFree shippingSeneye Reef Aquarium Monitor and Par Meter 0226-04
$199.00Free shipping8 watchingAQUANEAT Aquarium Thermometer Digital Fish Tank Temperature 6 PCS
$17.89Free shippingDigital Aquatics Reef Keeper Controller Power Bar PB4
$32.99$7.84 shipping5 watchingNew ListingNeptune Apex MXM module
$80.00or Best Offer$14.99 shippingNeptune® Breakout Box Cabinet Switch
$14.80$4.02 shippingAvast Marine Works breakout box for neptune controllers
$30.00or Best Offer$7.56 shippingFish Tank Thermometer High-precision Led Digital Display Aquarium Thermometer US
$7.35Was: $7.99or Best OfferFree shippingNeptune Systems Apex Lab Grade Ph And Orp Probe
$99.99Free shippingNeptune Systems FMM Apex Fluid Monitoring Module w/ Leak Detection and Optical
$149.99or Best OfferFree shippingNeptune Systems 1/4" Tubing Solenoid Valve Model No. SV-1
$24.99Free shippingGHL Doser 2
$200.000 bidsor Best OfferEnding May 20 at 2:36PM PDT7d 23h$9.89 shippingHI713-25 Phosphate Low Range Checker Reagent (25 Tests) - Hanna Instruments
$13.00$4.99 shipping166 soldNeptune® Breakout Box Upgrade
$18.49$4.02 shippingNeptune Apex EB8 Energy Bar
$53.002 bids$7.09 shippingEnding Monday at 6:23PM PDT1d 3hLCD Adhesive Strip Flat Thermometer Stick-on For Brew Window Fish Tank Aquarium
$1.80Free shipping52 soldNew ListingNever Used Coralife Digital Power Center 24/7 Timer
Digital Power Coralife Center Timer$15.000 bids$6.12 shippingEnding Saturday at 9:16PM PDT6d 5hNew Listingneptune systems AFS Automatic feeding system reef saltwater For Apex Fusion
$53.002 bids$9.99 shippingEnding Saturday at 3:30PM PDT6dNEPTUNE APEX CONTROLLER SYSTEM AQUARIUM
$284.0010 bids$6.09 shippingEnding Friday at 7:04PM PDT5d 3hNeptune System Apex AquaController Screen Display Module
$74.99Free shippingNeptune Apex LSM With 5 Lights
$56.002 bids$6.88 shippingEnding Monday at 6:32PM PDT1d 3hNew ListingNeptune Apex DOS Dosing System
$235.00$29.99 shippingneptune apex
$1,500.00or Best Offer$18.05 shippingauto water filler, Top off system, aquarium ATO sytem, water level controller
$11.99Free shippingPH Probe Meter Sensor BNC Connector Electrode For Aquarium Lab Controller Meter
$15.85or Best Offer153 soldWiFi Aquarium Electronic Salinity and Ph Value On-line Meter and Monitor #W2839
$126.75Was: $169.00Free shippingCustomizable Breakout Box 4x Lighted Toggle 2x Push Button for Apex Neptune
$75.99Was: $94.99or Best OfferFree shipping
Top Rated
- Aquatop Floating Glass Aquarium Thermometer W/ Suction Cup Mount100% agree - Would recommend$7.95 New