Aquarium Meters & Controllers
Best Selling
- (HI784) Marine Ammonia Checker Handheld Colorimeter (Saltwater) - Hanna Instrume$45.00 New$35.00 Used
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3,295 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 shippingAquarium Fish Tank Thermometer Temp Sticker Stick on **FAHRENHEIT IN BOLD!**
$1.99 to $4.99Free shipping364 soldJW Pet Fusion Smart Temp Magnet Style Aquarium Thermometer
$6.75Free shippingFish 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 shippingReef Keeper Lite Aquarium Controller - Digital Aquatics
$150.00or Best Offer$11.70 shippingCustomizable Apex Neptune Breakout Box 6 switches Many Colors Available
$31.99Was: $39.99or Best OfferFree shipping1 Aquarium Fish Tank Thermometer Temp Sticker Stick On **FAHRENHEIT IN BOLD!**
$1.99Free shipping4,795 soldNeptune Systems Apex Lab Grade Salinity - Conductivity Probe
$130.0111 bids$9.99 shippingEnding Today at 2:00PM PDT5h 8mNew ListingNeptune Apex A2 Controller
$150.000 bidsor Best OfferEnding Saturday at 4:30PM PDT6d 7h$12.99 shippingHanna Instruments HI758U Marine Calcium Checker Colorimeter Open Box
$50.00Free shippingNeptune System
$8.99 to $945.99Free shippingAvast Marine Works breakout box for neptune controllers
$30.00or Best Offer$7.56 shippingNeptune® Breakout Box Smart Dosing Container
$61.99$4.43 shippingOsmolator Nano 3152 Auto Top Off - Tunze With Pump
$59.00$11.60 shippingNeptune Systems Apex Lab Grade Ph And Orp Probe
$99.99Free shippingReef Keeper Lite Aquarium Controller
$175.00or Best Offer$8.82 shippingTunze Osmolator Universal 3155 Auto Top Off + FREE Tunze 5002.250 Storage conta
$189.99Estimated delivery dateEst. delivery Wed, May 15Neptune Systems PM1 pH/ORP Probe Module
$10.001 bid$5.93 shippingEnding Thursday at 10:14AM PDT4d 1hLCD Aquarium Digital Thermometer for Fish Tank Temperature Gauge Touch Screen
$9.98 to $13.22Was: $11.09Free shipping2x Covered Toggle 4x Push switch Apex Neptune breakout box with 24VDC alarm.
$100.00Was: $125.00Free shippingCO2 Generator System For Planted Aquariums To 40 Gallons Organic Bio Safe
$18.99or Best OfferFree shipping86 soldCustomizable Apex Neptune Breakout Box 2x Lighted Toggle Switches Push Terminal
$59.99Was: $74.99or Best OfferFree shippingFish Tank Thermometer High-precision Led Digital Display Aquarium Thermometer US
$7.35Was: $7.99or 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 PDT8d 5h$9.89 shippingNeptune Apex JR NEW
$225.000 bidsor Best OfferEnding May 20 at 11:36AM PDT8d 2h$6.26 shippingHI713-25 Phosphate Low Range Checker Reagent (25 Tests) - Hanna Instruments
$13.00$4.99 shipping166 soldNew Listingneptune systems AFS Automatic feeding system reef saltwater For Apex Fusion
$50.000 bids$9.99 shippingEnding Saturday at 3:30PM PDT6d 6hSeneye Reef Aquarium Monitor and Par Meter 0226-04
$199.00Free shipping8 watchingLCD Adhesive Strip Flat Thermometer Stick-on For Brew Window Fish Tank Aquarium
$1.80Free shipping52 soldNeptune Systems Apex A2 Base Unit w/ Probes & Magnetic Probe Holder
$379.99Free shippingNeptune Apex EB8 Energy Bar
$53.002 bids$7.09 shippingEnding Monday at 6:23PM PDT1d 9hNeptune® Breakout Box Upgrade
$18.49$4.02 shippingDual Fish Tank Aquarium Thermometer Temperature Sticker Celsius Fahrenheit °C
$1.95Free shipping473 soldAQUANEAT Aquarium Thermometer Digital Fish Tank Temperature 6 PCS
$17.89Free shippingneptune apex
$1,500.00or Best Offer$18.05 shippingNeptune Apex LSM With 5 Lights
$56.002 bids$6.88 shippingEnding Monday at 6:32PM PDT1d 9hNEPTUNE APEX CONTROLLER SYSTEM AQUARIUM
$284.0010 bids$6.09 shippingEnding Friday at 7:04PM PDT5d 10hauto water filler, Top off system, aquarium ATO sytem, water level controller
$11.99Free shippingNeptune® Breakout Box Cabinet Switch
$14.80$4.02 shippingPH Probe Meter Sensor BNC Connector Electrode For Aquarium Lab Controller Meter
$15.85or Best Offer153 soldNeptune systems energy bar 8 EB8 For Apex controller
$109.00Free shippingOne Aquarium Thermometer Temp Sticker USA SELLER STICK ON! 🇺🇸
$2.05or Best OfferFree shippingNew 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 12hW2825 WiFi Aquarium Electronic Salinity and Ph Value On-line Meter and Monitor
$114.07Was: $123.99or Best OfferFree shippingDigital Aquatics Reef Keeper Controller Power Bar PB4
$32.99$7.84 shipping5 watching
Top Rated
- Aquatop Floating Glass Aquarium Thermometer W/ Suction Cup Mount100% agree - Would recommend$7.95 New