A 335,000 U.S. gallon (1.3 million liter) aquarium at the Monterey Bay Aquarium in California displaying a simulated kelp forest ecosystemSouth East Asian fish in the aquarium at Bristol Zoo, Bristol, England. The tank is about 2 metres (6 feet) high.Koi have been kept in decorative ponds for centuries in China and Japan.

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Aquarium Meters, Regulators

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Neptune Systems Apex Dos Dosing Pump Doser (unused) And Free Extra Dosing Head!Neptune Systems Apex Dos Dosing Pump Doser (unused) And Free Extra Dosing Head! $265.00 Neptune Apex Controller Orange labelNeptune Apex Controller Orange label $374.99
American Marine Pinpoint Lab pH ProbeAmerican Marine Pinpoint Lab pH Probe $39.90 Hm Digital Dm-1 Inline Dual Tds Monitor Online Ro Di Water Filter ppm Meter 1/4"Hm Digital Dm-1 Inline Dual Tds Monitor Online Ro Di Water Filter ppm Meter 1/4" $19.99
Seneye Home MonitorSeneye Home Monitor $149.99 Milwaukee Mc122 pH ControllerMilwaukee Mc122 pH Controller $135.00
Smart Ato Micro Auto Top Off System with Pump - Full System - AutoAquaSmart Ato Micro Auto Top Off System with Pump - Full System - AutoAqua $134.99 Aquarium Digital Thermometer Fish Tank Salt Water Terrarium with Extra BatteryAquarium Digital Thermometer Fish Tank Salt Water Terrarium with Extra Battery $5.12 to $24.19
Hm Digital Triple Tds MonitorHm Digital Triple Tds Monitor $40.49 Neptune | Ddr Dos Dual ReservoirNeptune | Ddr Dos Dual Reservoir $224.99
Aquarium Fish Tank Water Thermometer Digital Electronic Lcd Sensor ControllerAquarium Fish Tank Water Thermometer Digital Electronic Lcd Sensor Controller $6.49 1 Ea Dual Aquarium Fish Tank Thermometer Stick-on C*&F*Chrismas Sale free ship1 Ea Dual Aquarium Fish Tank Thermometer Stick-on C*&F*Chrismas Sale free ship $1.99
American Marine Pinpoint Salinity Monitor w/probeAmerican Marine Pinpoint Salinity Monitor w/probe $119.95 AutoAqua Smart Security System Combo Set, Skimmer, Level and temperature SetAutoAqua Smart Security System Combo Set, Skimmer, Level and temperature Set $159.99
Atc Aquatics Seawater RefractometerAtc Aquatics Seawater Refractometer $3.95 GrowBro Co2 Generator Refill Kit Grow Box Cabinets Bucket Bag Pc HydroponicGrowBro Co2 Generator Refill Kit Grow Box Cabinets Bucket Bag Pc Hydroponic $11.99
Milwaukee- Mw600 Dissolved Oxygen Do Meter - Checker TesterMilwaukee- Mw600 Dissolved Oxygen Do Meter - Checker Tester $172.00 American Marine Pinpoint Orp Monitor Includes Probe & Calibration FluidsAmerican Marine Pinpoint Orp Monitor Includes Probe & Calibration Fluids $113.99
American Marine Pinpoint Ph Controller - Aquarium Water Tester MeterAmerican Marine Pinpoint Ph Controller - Aquarium Water Tester Meter $188.99 Neptune Apex Jr / Energy Bar 8 / Fluid Monitoring / Leak DetectionNeptune Apex Jr / Energy Bar 8 / Fluid Monitoring / Leak Detection $198.50
Auto Top Off Controller - JbjAuto Top Off Controller - Jbj $41.00 Hanna Hi772 Marine Dkh Alkalinity Checker Hc Alk - Hanna InstrumentsHanna Hi772 Marine Dkh Alkalinity Checker Hc Alk - Hanna Instruments $49.95
Hydrometer Aquarium Saltwater Reef Salt Water Specific Gravity Salinity St-03Hydrometer Aquarium Saltwater Reef Salt Water Specific Gravity Salinity St-03 $7.99 List price:  Previous Price $14.99 Tunze 5000.020 Replacement Ato Pump For 3155 Osmolator 3152 Nano Auto Top OffTunze 5000.020 Replacement Ato Pump For 3155 Osmolator 3152 Nano Auto Top Off $24.98
Aquarium Co2 Diffuser Corner for Fish Tank Water Plants 4/6mm Tubeing SolenoidAquarium Co2 Diffuser Corner for Fish Tank Water Plants 4/6mm Tubeing Solenoid $8.98 New Open Box Fluval 2 Channel Led Lamp Light Timer A3977 Hagen Fish TankNew Open Box Fluval 2 Channel Led Lamp Light Timer A3977 Hagen Fish Tank $9.00
New listing
		Osmolator Nano Auto Water Top offNew listing Osmolator Nano Auto Water Top off $50.00 Milwaukee Mc122 pH Controller 115V, for Co2 Dosing/Monitor/Meter/Inst rumentsMilwaukee Mc122 pH Controller 115V, for Co2 Dosing/Monitor/Meter/Inst ruments $130.00
Tunze Osmolator Universal 3155 Aquarium Auto Top Off System - 3155Tunze Osmolator Universal 3155 Aquarium Auto Top Off System - 3155 $198.99 New listing
		Hanna Pocket Photometer Phosphate Checker Hi713New listing Hanna Pocket Photometer Phosphate Checker Hi713 $15.00
Tunze Water Level Osmolator Nano 3152 Automatic Aquarium Water Top Off AtoTunze Water Level Osmolator Nano 3152 Automatic Aquarium Water Top Off Ato $99.99 Seneye Home Aquarium Monitor - SeneyeSeneye Home Aquarium Monitor - Seneye $149.00
AutoAqua Micro Smart Aquarium Ato Automatic Top Off System W/ Pump, EvaporationAutoAqua Micro Smart Aquarium Ato Automatic Top Off System W/ Pump, Evaporation $130.00 Neptune system Apex Trident Brand New Ship FastNeptune system Apex Trident Brand New Ship Fast $700.00
teffo; Aquarium Temperature Controller w/Magnetic Sensor;WiFi Thermometer;2-Stagteffo; Aquarium Temperature Controller w/Magnetic Sensor;WiFi Thermometer;2-Stag $39.99 American Marine Pinpoint Orp Monitor with probe and calibration fluidAmerican Marine Pinpoint Orp Monitor with probe and calibration fluid $114.99
AutoAqua Micro Smart Aquarium Ato Automatic Top Off System W/ Pump,Open BoxAutoAqua Micro Smart Aquarium Ato Automatic Top Off System W/ Pump,Open Box $99.00 Neptune Systems Energy Bar 8 Expansion Unit (Eb8)Neptune Systems Energy Bar 8 Expansion Unit (Eb8) $164.99
Aquatic Life pH Controller/Orp Monitor- free shippingAquatic Life pH Controller/Orp Monitor- free shipping $109.99 Ecotech Marine L1 Qd Quiet Drive Controller *Controller Only!*Ecotech Marine L1 Qd Quiet Drive Controller *Controller Only!* $45.00
Hanna Instruments Ultra Low Range Phosphate Checker Ulr Hi774, Saltwater ReefHanna Instruments Ultra Low Range Phosphate Checker Ulr Hi774, Saltwater Reef $49.95 New listing
		Neptune Apex El Aquarium Controller With WifiNew listing Neptune Apex El Aquarium Controller With Wifi $83.00
Duetto Dual-Sensor Ato Aquarium Auto-Top-Off System - Xp AquaDuetto Dual-Sensor Ato Aquarium Auto-Top-Off System - Xp Aqua $119.99 AquaticLife Ph Controller Aquatic LifeAquaticLife Ph Controller Aquatic Life $80.00
Sicce Wave Surfer Controller For Voyager Aquarium Water PumpsSicce Wave Surfer Controller For Voyager Aquarium Water Pumps $86.71 Neptune Sytems Apex Waveline Vdm Signal Cable Dcc3Neptune Sytems Apex Waveline Vdm Signal Cable Dcc3 $20.00
Seneye Home Aquarium MonitorSeneye Home Aquarium Monitor $149.00 Tunze Osmolator 3152 Nano - Auto Top Off SystemTunze Osmolator 3152 Nano - Auto Top Off System $98.00
Tunze Osmolator Nano 3152 - Aquarium Automatic Refill System Ato Auto Top OTunze Osmolator Nano 3152 - Aquarium Automatic Refill System Ato Auto Top O $97.46 Reef Fanatic Auto Top Off - Level Controller Ato - 2 sensorReef Fanatic Auto Top Off - Level Controller Ato - 2 sensor $83.99
Zoo Med Repticare Day Night Reptile Timer Lot of 3 Wall TimmersZoo Med Repticare Day Night Reptile Timer Lot of 3 Wall Timmers $1.55 Marine James Bliss Lucite Thermometer & Hygrometer  9.5" X 4" from the 70'sMarine James Bliss Lucite Thermometer & Hygrometer  9.5" X 4" from the 70's $18.90
Milwaukee Instruments Sea Water Digital Refractometer Water Tester Ma887Milwaukee Instruments Sea Water Digital Refractometer Water Tester Ma887 $114.00 List price:  Previous Price $139.99 Bubble Magus Seaside Aquatics Magnetic Aquarium Quad (4) Probe Holder Fish TankBubble Magus Seaside Aquatics Magnetic Aquarium Quad (4) Probe Holder Fish Tank $23.99
New Digital Lcd Fish Tank Aquarium Marine Water Thermometer Temperature BlackNew Digital Lcd Fish Tank Aquarium Marine Water Thermometer Temperature Black $4.88 New listing
		Zacro Lcd Digital Aquarium Thermometer Fish Tank Water Terrarium TemperatureNew listing Zacro Lcd Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature $14.95
Milwaukee Digitial Seawater Salinity RefractometerMilwaukee Digitial Seawater Salinity Refractometer $114.00 Vertex Cerebra Prima Aquarium ControllerVertex Cerebra Prima Aquarium Controller $540.00
Set Of 5 Temperature 93-64 Fahrenheit degrees Lcd Adhesive Strip ThermometerSet Of 5 Temperature 93-64 Fahrenheit degrees Lcd Adhesive Strip Thermometer $5.00 Lifegard Big Time & Temp Digital Aquarium Thermometer Fast Free Usa ShippingLifegard Big Time & Temp Digital Aquarium Thermometer Fast Free Usa Shipping $32.95
New listing
		Ogs Aquarium Glass Thermometer LiquidationNew listing Ogs Aquarium Glass Thermometer Liquidation $24.90 Milwaukee Mc510 Orp Controller w/probeMilwaukee Mc510 Orp Controller w/probe $141.00
Reef Fanatic Ph Controller w/probeReef Fanatic Ph Controller w/probe $154.99 AutoAqua Qeye Wifi Aquarium Camera OnlyAutoAqua Qeye Wifi Aquarium Camera Only $229.99
Aquarium Temperature Controller Magnetic Sensor WiFi Smart Thermometer 2-StageAquarium Temperature Controller Magnetic Sensor WiFi Smart Thermometer 2-Stage $34.99 Was:  Previous Price $49.99 Milwaukee Smart Monitoring System pH Controller Aquarium Tester w/ Cal. SolutionMilwaukee Smart Monitoring System pH Controller Aquarium Tester w/ Cal. Solution $130.00
Tunze Turbelle NanoStream 6055 Controllable Pump w/ Controller ElectronicTunze Turbelle NanoStream 6055 Controllable Pump w/ Controller Electronic $188.69 Dual Optical Auto Top Off Controller - Aquarium Water Ato - IcecapDual Optical Auto Top Off Controller - Aquarium Water Ato - Icecap $124.99
ApexEl Controller - Neptune Apex Controller Wifi Model - Entry LevelApexEl Controller - Neptune Apex Controller Wifi Model - Entry Level $499.95 Aquadyne Octopus 3000 Programmable Computer Monitoring SystemAquadyne Octopus 3000 Programmable Computer Monitoring System $185.00
Neptune Systems Optical Level Sensor with Magnetic Mount Os-1-MNeptune Systems Optical Level Sensor with Magnetic Mount Os-1-M $21.50 Milwaukee Mc122 pH Controller w/probeMilwaukee Mc122 pH Controller w/probe $125.95 Trending at $130.00
Ghl Doser 2.1 Slave UnitGhl Doser 2.1 Slave Unit $400.00 Neptune Salinity - Conductivity Probe - Lab GradeNeptune Salinity - Conductivity Probe - Lab Grade $125.00
Lcd Digital Fish Aquarium Thermometer Water Terrarium Black Free Extra Batteries
00004000Lcd Digital Fish Aquarium Thermometer Water Terrarium Black Free Extra Batteries 00004000 $5.59 Digital Lcd Fish Aquarium Thermometer with Submersible Probe & Battery Us StockDigital Lcd Fish Aquarium Thermometer with Submersible Probe & Battery Us Stock $6.79
Icecap Ato - Automatic Top Off Aquarium SystemIcecap Ato - Automatic Top Off Aquarium System $124.99 Tds Meter from Hm Digital for $24.95Tds Meter from Hm Digital for $24.95 $10.00
Complete Ato & Surface Skimmer For Sumpless Aquariums - Xp AquaComplete Ato & Surface Skimmer For Sumpless Aquariums - Xp Aqua $134.99 American Marine Pinpoint Conductivity Monitor + Probe & Calibration FluidAmerican Marine Pinpoint Conductivity Monitor + Probe & Calibration Fluid $103.89
Neptune Apex Trident in Brand New & Sealed Box + Free Shipping. In StockNeptune Apex Trident in Brand New & Sealed Box + Free Shipping. In Stock $850.00 Aquarium/Terrarium Big Digital Thermometer with Hi/Lo Memory and Visual AlertAquarium/Terrarium Big Digital Thermometer with Hi/Lo Memory and Visual Alert $11.99
Seneye Web Server (Non Wifi) - SeneyeSeneye Web Server (Non Wifi) - Seneye $199.00 *New* Aquatek Aquarium Co2 Regulator Mini with Integrated Cool Touch Solenoid*New* Aquatek Aquarium Co2 Regulator Mini with Integrated Cool Touch Solenoid $69.99
Milwaukee Instruments Mc720, Mc122 + Mp810 Combo pH Controller + Dosing PumpMilwaukee Instruments Mc720, Mc122 + Mp810 Combo pH Controller + Dosing Pump $210.00 Neptune Systems Apex Classic AquaController NewNeptune Systems Apex Classic AquaController New $575.99
Icecap - Dual Optical Auto Top Off ControllerIcecap - Dual Optical Auto Top Off Controller $124.99 3X Aquarium Lcd Digital Fish Thermometer Water Terrarium Black Free Batteries3X Aquarium Lcd Digital Fish Thermometer Water Terrarium Black Free Batteries $7.89
Hydor Smart Level Control Water Sensor Level for Aquariums and Sumps Used 1 YearHydor Smart Level Control Water Sensor Level for Aquariums and Sumps Used 1 Year $49.99 Auto TopOff & Water ChangerAuto TopOff & Water Changer $199.99
Neptune Systems Apex Lab Grade pH Probe -Fish & Aquariums Free Shipping SaleNeptune Systems Apex Lab Grade pH Probe -Fish & Aquariums Free Shipping Sale $98.20 Jebao Dc Water Pump Controller + Ballast for Aquarium Fish Reef TankJebao Dc Water Pump Controller + Ballast for Aquarium Fish Reef Tank $69.00
American Marine Pinpoint Ph Monitor + Probe And Calibration FluidAmerican Marine Pinpoint Ph Monitor + Probe And Calibration Fluid $45.00 (New, Never Opened) Neptune Systems Ddr Dos Dual Reservoir for Saltwater Reef(New, Never Opened) Neptune Systems Ddr Dos Dual Reservoir for Saltwater Reef $199.99
Milwaukee Mc510 Orp/Mv Controller, Probe Included, 115V, Sms510/Monitor/MeterMilwaukee Mc510 Orp/Mv Controller, Probe Included, 115V, Sms510/Monitor/Meter $136.00 IceCap Liquid Dosing ContainersIceCap Liquid Dosing Containers $34.99 to $44.99
Milwaukee Mc120 pH Monitor w/probeMilwaukee Mc120 pH Monitor w/probe $85.99 Milwaukee- Mc122 Ph Controller With Mounting Kit And Probe Holder Co2 DosingMilwaukee- Mc122 Ph Controller With Mounting Kit And Probe Holder Co2 Dosing $130.00
Tunze Osmolator Universal 3155 Marine Aquarium Auto Top - Off System Water levelTunze Osmolator Universal 3155 Marine Aquarium Auto Top - Off System Water level $199.99 Co2 Working Pressure Adjustable Solenoid Regulator - Diffuser Atomizer Fish TankCo2 Working Pressure Adjustable Solenoid Regulator - Diffuser Atomizer Fish Tank $102.59
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Prices current as of last update, 02/28/20 1:27am.

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