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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New Tiny Seas Digital Lcd Aquarium Temperature Thermometer Free Extra BatteryNew Tiny Seas Digital Lcd Aquarium Temperature Thermometer Free Extra Battery $4.55 Neptune Systems Apex Classic AquaController System with Lab Grade pH ProbeNeptune Systems Apex Classic AquaController System with Lab Grade pH Probe $472.20
*New* Basic Aquatek Co2 Regulator with Integrated Cool Touch Solenoid*New* Basic Aquatek Co2 Regulator with Integrated Cool Touch Solenoid $79.99 Deep Blue Aquarium Professional Accurate High Performance Suction ThermometerDeep Blue Aquarium Professional Accurate High Performance Suction Thermometer $6.47
Meco(Tm) Aquarium Glass Hydrometer Fish Tank Water Temperature Thermometer SaltMeco(Tm) Aquarium Glass Hydrometer Fish Tank Water Temperature Thermometer Salt $11.61 Milwaukee Ma911B/2 pH Electrode Probe works with Sms120/Sms122/Sms125Milwaukee Ma911B/2 pH Electrode Probe works with Sms120/Sms122/Sms125 $38.95
Ghl Profilux Ii - Light Aquarium Computer w/ temp probeGhl Profilux Ii - Light Aquarium Computer w/ temp probe $195.00 Waterproof Aquarium Lcd Digital Submersible Thermometer Fish Tank Pet SuppliesWaterproof Aquarium Lcd Digital Submersible Thermometer Fish Tank Pet Supplies $6.47
Eheim Jager Aquarium Heater Fully Submersible! (Pick Your Size) 25W To 300WEheim Jager Aquarium Heater Fully Submersible! (Pick Your Size) 25W To 300W $22.99 to $29.99 Top Fin Digital Thermometer for Aquarium includes battery [♡Free Shipping♡]Top Fin Digital Thermometer for Aquarium includes battery [♡Free Shipping♡] $11.99
Hydor-Koralia-Smart-Wave- Circulation-Pump-Timer-Con trollerHydor-Koralia-Smart-Wave- Circulation-Pump-Timer-Con troller $51.99 Neptune Systems Solenoid Valve Sv-1 for AquariumNeptune Systems Solenoid Valve Sv-1 for Aquarium $29.95
American Marine Pinpoint Salinity Calibration Fluid, 53.0mS / 1.026SgAmerican Marine Pinpoint Salinity Calibration Fluid, 53.0mS / 1.026Sg $9.95 New listing
		Genesis Reef Renew + Storm Ato and water exchangeNew listing Genesis Reef Renew + Storm Ato and water exchange $25.00
Coralbox Powercell - Jebao/Jecod Battery Backup For Wave Pumps & Dc PumpsCoralbox Powercell - Jebao/Jecod Battery Backup For Wave Pumps & Dc Pumps $92.98 Neptune Systems Apex Fmm 1/4 Inch Solenoid ValveNeptune Systems Apex Fmm 1/4 Inch Solenoid Valve $29.95
Aquarium Floating Thermometer Suction Cup Temperature Monitor Safety IndicatorAquarium Floating Thermometer Suction Cup Temperature Monitor Safety Indicator $10.48 Deluxe Aquatek Co2 Brass Bubble Counter with Integrated Check ValveDeluxe Aquatek Co2 Brass Bubble Counter with Integrated Check Valve $16.99
Aquarium Fish Tank Submersible Glass Thermometer Suction Transparent HydrometerAquarium Fish Tank Submersible Glass Thermometer Suction Transparent Hydrometer $4.99 Auto Lcd Digital Mini Aquarium Fish Food Feeder Feeding Time Timer for Fish TankAuto Lcd Digital Mini Aquarium Fish Food Feeder Feeding Time Timer for Fish Tank $5.49
6x Fish Aquarium Lcd Digital Thermometer Water Terrarium Black Free Batteries6x Fish Aquarium Lcd Digital Thermometer Water Terrarium Black Free Batteries $13.89 Neptune Systems Apex Wireless Expansion Wxm Module/Vortech AquaControllerNeptune Systems Apex Wireless Expansion Wxm Module/Vortech AquaController $20.50
Seawater 35 Ppt Refractometer Salt Calibration Solution - 60 Ml - Aquarium ReefSeawater 35 Ppt Refractometer Salt Calibration Solution - 60 Ml - Aquarium Reef $11.48 Smart Level Security - AutoaquaSmart Level Security - Autoaqua $59.99
Seneye Slide Ammonia & pH(6.5-9) 3pkSeneye Slide Ammonia & pH(6.5-9) 3pk $36.99 Refractometer Calibration Solution - 60 Ml - Aquacraft 35 Ppt - 2ozRefractometer Calibration Solution - 60 Ml - Aquacraft 35 Ppt - 2oz $11.49
6 pcs Lcd Digital Fish Aquarium Thermometer Water Terrarium Free Batteries6 pcs Lcd Digital Fish Aquarium Thermometer Water Terrarium Free Batteries $14.49 Innovative Marine HydroFill Ti – Ato Controller Aquarium Automatic Top Off 7503Innovative Marine HydroFill Ti – Ato Controller Aquarium Automatic Top Off 7503 See details... $70.00
Deluxe Aquatek Co2 Regulator + Co2 Proof tubingDeluxe Aquatek Co2 Regulator + Co2 Proof tubing $77.99 Up inline Co2 Atomizer system diffuser calcium reactor 12/16mm 1/2' ship UsaUp inline Co2 Atomizer system diffuser calcium reactor 12/16mm 1/2' ship Usa $25.99
3X Aquarium Lcd Digital Fish Thermometer Water Terrarium Black Free Batteries3X Aquarium Lcd Digital Fish Thermometer Water Terrarium Black Free Batteries $7.79 Lcd Digital Fish Aquarium Thermometer Water Free Extra BatteriesLcd Digital Fish Aquarium Thermometer Water Free Extra Batteries $4.55 to $4.99
Neptune Systems Apex Pm2 Salinity, Conductivity, Temperature, I/O ExpansionNeptune Systems Apex Pm2 Salinity, Conductivity, Temperature, I/O Expansion $84.94 Hm Digital Dm-1 Inline Dual Tds 
00006000
Monitor Online Ro Di Water Filter ppm Meter 1/4"Hm Digital Dm-1 Inline Dual Tds 00006000 Monitor Online Ro Di Water Filter ppm Meter 1/4" $26.50
Exo Terra Combo Digital Thermo-HygrometerExo Terra Combo Digital Thermo-Hygrometer $16.82 List price:  Previous Price $28.99 Dual Aquarium Fish Tank Thermometer Temperature Stick-on Fahrenheit °F NewDual Aquarium Fish Tank Thermometer Temperature Stick-on Fahrenheit °F New $2.50
Marina Aquarium Thermometer Suction Cup & Small & 2-PackMarina Aquarium Thermometer Suction Cup & Small & 2-Pack $4.67 Tunze Osmolator Nano 3152 - Aquarium Automatic Refill System Ato Auto Top OTunze Osmolator Nano 3152 - Aquarium Automatic Refill System Ato Auto Top O $98.99
Aquatek Co2-Proof Tubing 16 FeetAquatek Co2-Proof Tubing 16 Feet $13.80 ReefLink Aquarium Controller - EcoTech MarineReefLink Aquarium Controller - EcoTech Marine $75.00
Neptune Systems Apex aquarium controller - Base, Salinity, pH, Orp, Temp ProbesNeptune Systems Apex aquarium controller - Base, Salinity, pH, Orp, Temp Probes $799.00 Pinpoint - Orp Redox 400 Calibration Fluid (3 Pack)Pinpoint - Orp Redox 400 Calibration Fluid (3 Pack) $12.79
hanna phosphate testerhanna phosphate tester $40.00 Neptune Systems Apex Fs-100 Flow Sensor - 1 Inch With UnionsNeptune Systems Apex Fs-100 Flow Sensor - 1 Inch With Unions $59.95
Neptune Apex Classic Aquarium Controller with Energy Bar 8Neptune Apex Classic Aquarium Controller with Energy Bar 8 $470.00 Lcd Digital Thermometer with Probe Aquarium Water Black Free Extra BatteriesLcd Digital Thermometer with Probe Aquarium Water Black Free Extra Batteries $4.88
Lcd 3D Crystal Digital Electronic Aquarium Thermometer Fish Tank Temp Meter UsLcd 3D Crystal Digital Electronic Aquarium Thermometer Fish Tank Temp Meter Us $5.74 Neptune Systems Apex Os-1 Optical Level Sensor For FmmNeptune Systems Apex Os-1 Optical Level Sensor For Fmm $24.95
$7.50 Archon WiFi Aquarium Controller - Digital Aquatics - Brand NewArchon WiFi Aquarium Controller - Digital Aquatics - Brand New $399.99
Hde Lcd Digital Fish Tank Aquarium Thermometer Terrarium Marine Temperatur.Hde Lcd Digital Fish Tank Aquarium Thermometer Terrarium Marine Temperatur. $14.46 Hm Digital Dm-2 Inline Dual Tds Monitor, 2x 1/4" Tee, online water ppm meterHm Digital Dm-2 Inline Dual Tds Monitor, 2x 1/4" Tee, online water ppm meter $39.50
Boyu Glass Meter Aquarium Fish Tank Water Temperature Thermometer w/Suction CupBoyu Glass Meter Aquarium Fish Tank Water Temperature Thermometer w/Suction Cup $4.26 Neptune Systems Optical Level Sensor Os-1 for AquariumNeptune Systems Optical Level Sensor Os-1 for Aquarium $24.95
Neptune Systems Apex Dos With Ddr Dos Dual Reservoir Bundle Combo PackNeptune Systems Apex Dos With Ddr Dos Dual Reservoir Bundle Combo Pack $449.95 CarbonDoser Electronic Co2 Regulator The Best in the world (Authorized Seller)CarbonDoser Electronic Co2 Regulator The Best in the world (Authorized Seller) $299.99
Hm Digital Dm-1 In-Line Dual Tds Monitor, 0-9990 ppm Range +/- 2%Hm Digital Dm-1 In-Line Dual Tds Monitor, 0-9990 ppm Range +/- 2% $29.40 Aquatek Premium Brass Check ValveAquatek Premium Brass Check Valve $11.99
Tunze Water Level Osmolator Nano 3152 Automatic Aquarium Water Top Off AtoTunze Water Level Osmolator Nano 3152 Automatic Aquarium Water Top Off Ato $92.99 AutoTopoff Nano - Water Level Controller for Reef Aquarium - Auto Top Off AtoAutoTopoff Nano - Water Level Controller for Reef Aquarium - Auto Top Off Ato $40.00
Zilla 24/7 Digital Timer Power Center 11893, 1875-Watt, New, Free ShippingZilla 24/7 Digital Timer Power Center 11893, 1875-Watt, New, Free Shipping $27.66 List price:  Previous Price $39.14 Auto-top-off Ato solution auto water filler Adjustable Float Valve Aquarium sumpAuto-top-off Ato solution auto water filler Adjustable Float Valve Aquarium sump $17.99
Jebao/Jecod Pump To Neptune Systems Apex Controller Linkage AdapterJebao/Jecod Pump To Neptune Systems Apex Controller Linkage Adapter $39.99 Co2 Generator System For Planted Aquariums To 40 Gallons Organic Bio SafeCo2 Generator System For Planted Aquariums To 40 Gallons Organic Bio Safe $19.99
Seneye Home Aquarium Monitor - SeneyeSeneye Home Aquarium Monitor - Seneye $149.00 Ista turbo Co2 Reactor Diffuser 12/16mm External for aquarium plants Atomizer phIsta turbo Co2 Reactor Diffuser 12/16mm External for aquarium plants Atomizer ph $27.39
1-1.07Sg Atc Salt Sea Water Tester Salinity Refractometer Aquarium Hydrometer1-1.07Sg Atc Salt Sea Water Tester Salinity Refractometer Aquarium Hydrometer $16.45 Inkbird Aquarium Aquarium Heaters Dual Stage Temperature Controller Ntc Sensor,Inkbird Aquarium Aquarium Heaters Dual Stage Temperature Controller Ntc Sensor, $46.84
Apex Linkage Jebao Aqualink A1 Wifi Controller Neptune Adapter Dct Dcs Dcp Qp CpApex Linkage Jebao Aqualink A1 Wifi Controller Neptune Adapter Dct Dcs Dcp Qp Cp $79.99 2 Tiny Seas Digital Lcd Aquarium Temperature Thermometer 2 Free Extra Batteries2 Tiny Seas Digital Lcd Aquarium Temperature Thermometer 2 Free Extra Batteries $7.25
Zacro Pack of 2 Lcd Digital Aquarium Thermometer Fish Tank Water Terrarium TempZacro Pack of 2 Lcd Digital Aquarium Thermometer Fish Tank Water Terrarium Temp $13.57 Jw Pet Fusion Standing Aquarium ThermometerJw Pet Fusion Standing Aquarium Thermometer $5.36 Was:  Previous Price $6.31
Milwaukee pH51 Waterproof pH Tester/Meter Sharp Portable pH 51Milwaukee pH51 Waterproof pH Tester/Meter Sharp Portable pH 51 $39.99 Neptune Systems Apex Gold AquaController System with Lab Grade pH Probe and moreNeptune Systems Apex Gold AquaController System with Lab Grade pH Probe and more $400.00
Brightwell Refractometer Calibration Solution 60 ml Fast Free Usa ShippingBrightwell Refractometer Calibration Solution 60 ml Fast Free Usa Shipping $6.95 Was:  Previous Price $9.27 Coral Box Ato Smart Auto Top Off Optical Sensor Pump float Us warranty jebaoCoral Box Ato Smart Auto Top Off Optical Sensor Pump float Us warranty jebao $68.99
New listing
		Neptune Systems Apex Pm1 Ph/Orp & Temp ModuleNew listing Neptune Systems Apex Pm1 Ph/Orp & Temp Module $74.00 Salinity Refractometer Seawater & Aquarium - Dual Scale (1.0 to 1.070 S.G.)Salinity Refractometer Seawater & Aquarium - Dual Scale (1.0 to 1.070 S.G.) $15.59
100W 200W 300W Aquarium Heater Submersible Fish Tank Water + Lcd Thermometer100W 200W 300W Aquarium Heater Submersible Fish Tank Water + Lcd Thermometer $11.89 to $12.19 6" wide x 12" deep x 12" tall Ato aquarium auto top off container tank6" wide x 12" deep x 12" tall Ato aquarium auto top off container tank $74.99
Digital Lcd Thermometer for Aquarium Fish Tank Vivarium Reptile TerrariumDigital Lcd Thermometer for Aquarium Fish Tank Vivarium Reptile Terrarium $5.36 Jebao New Controller Cradle / Wall Mount - 3D Printed - Many ColorsJebao New Controller Cradle / Wall Mount - 3D Printed - Many Colors $10.00
Spectrapure Hm Digital Dm-1 In-Line Dual-Probe Tds MeterSpectrapure Hm Digital Dm-1 In-Line Dual-Probe Tds Meter $29.35 AutoAqua Smart Ato Micro 120P - Auto Top Off System ~ New In Box!AutoAqua Smart Ato Micro 120P - Auto Top Off System ~ New In Box! $86.00
3 pcs Lcd Digital Fish Aquarium Thermometer Water Black Free Extra Batteries3 pcs Lcd Digital Fish Aquarium Thermometer Water Black Free Extra Batteries $7.86 neptune systems apexneptune systems apex $265.00
Dual Aquarium Fish Tank Thermometer Temperature Sticker Stick-on Fahrenheit °FDual Aquarium Fish Tank Thermometer Temperature Sticker Stick-on Fahrenheit °F $2.54 Fish Tank Aquarium Thermometer Floating Safe Zone Salt Fresh Water TemperatureFish Tank Aquarium Thermometer Floating Safe Zone Salt Fresh Water Temperature $7.20
Neptune Systems Apex Fluid Monitoring Module Fmm for AquariumNeptune Systems Apex Fluid Monitoring Module Fmm for Aquarium $99.95 Neptune Systems Apex Jr AquaController Aquarium (Display, Base Unit, Temp Probe)Neptune Systems Apex Jr AquaController Aquarium (Display, Base Unit, Temp Probe) $180.00
Rossmont Waver Wireless 2-Channel Circulation Pump ControllerRossmont Waver Wireless 2-Channel Circulation Pump Controller $159.95 Neptune Systems Apex Fmk Ld-1 Low Profile Leak Detection Probe For Under CarpetNeptune Systems Apex Fmk Ld-1 Low Profile Leak Detection Probe For Under Carpet $29.95
Co2 Omnibus Regulator -Aquarium Adjustable for co2 tank & co2 cartridge tankCo2 Omnibus Regulator -Aquarium Adjustable for co2 tank & co2 cartridge tank $31.59 Dual Temperature Scales Aquarium Thermometer in Glass Tube(Ship From Usa)Dual Temperature Scales Aquarium Thermometer in Glass Tube(Ship From Usa) $3.75 to $5.99
American Marine Pinpoint Ph Controller - Aquarium Water Tester MeterAmerican Marine Pinpoint Ph Controller - Aquarium Water Tester Meter $188.99 Digital Aquatics reefkeeper elite v2 with net module and extras!Digital Aquatics reefkeeper elite v2 with net module and extras! $450.00
Digital Lcd Aquarium Fish Thermometer Water Terrarium Black Free BatteriesDigital Lcd Aquarium Fish Thermometer Water Terrarium Black Free Batteries $4.97 to $20.09 Milwaukee Mc122 pH Controller 115V, for Co2 Dosing/Monitor/Tester/Met erMilwaukee Mc122 pH Controller 115V, for Co2 Dosing/Monitor/Tester/Met er $125.95
Tunze Turbelle NanoStream 6055 Controllable Pump w/ Controller ElectronicTunze Turbelle NanoStream 6055 Controllable Pump w/ Controller Electronic $174.99 American Marine Pinpoint pH ProbeAmerican Marine Pinpoint pH Probe $39.95
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Prices current as of last update, 02/21/18 7:56pm.

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