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Aquarium controllers are an essential part of a complete aquarium system. These sophisticated automation systems include a portfolio of accessories to monitor and control equipment like water level sensors, ATO pumps, and other devices.

At AquaCave, we offer some of the best selections and best prices on Aquarium Controllers and controller accesories for your marine, reef, and freshwater aquarium.

  • Hanna HI801-01 iris Visible Spectrophotometer Hanna HI801-01 iris Visible Spectrophotometer

    Hanna Instruments

    Hanna HI801-01 iris Visible Spectrophotometer

    Hanna HI801-01 iris Visible Spectrophotometer The HI801 iris is a sleek and intuitive spectrophotometer that allows for measurement of all wavelengths of visible light. Customize your methods, take a wide range of measurements, and feel confident in...

    $3,199.99
  • Hanna HI88703-01 EPA Compliant Benchtop Turbidity Meter

    Hanna Instruments

    Hanna HI88703-01 EPA Compliant Benchtop Turbidity Meter

    Hanna HI88703-01 EPA Compliant Benchtop Turbidity Meter The HI88703 is a high accuracy (±2% of reading plus 0.02 NTU) Turbidity Benchtop Meter. The meter is supplied complete with AMCO-AEPA-1 primary turbidity standards used for calibration and...

    $2,199.99
  • Neptune Systems A3 Apex Pro Controller System, Bundle Neptune Systems A3 Apex Pro Controller System, Bundle

    Neptune Systems

    Neptune Systems A3 Apex Pro Controller System, Bundle

    Neptune Systems A3 Apex Pro Controller System, Bundle Kit Includes: 1x A3 Apex Pro Controller System 2x Energy Bar 832 1x pH PRobe 1x Temp Probe 1x ORP Probe 1x Salinity Probe 1x DoS Fluid Metering Module 1x Automatic Feeding System (AFS) 1x...

    Was: $2,472.91
    Now: $2,101.97
  • Hanna HI98198 Optical Dissolved Oxygen Meter Hanna HI98198 Optical Dissolved Oxygen Meter Hanna HI98198 Optical Dissolved Oxygen Meter

    Hanna Instruments

    Hanna HI98198 Optical Dissolved Oxygen Meter

    Hanna HI98198 Optical Dissolved Oxygen Meter The HI98198 Optical Dissolved Oxygen Meter makes measuring the concentration of dissolved oxygen hassle-free. Optical DO technology doesn't require a minimum flow rate, so there is less drift in your...

    $1,929.99
  • Neptune A3 Apex Pro System and TRIDENT Controller Kit Neptune A3 Apex Pro System and TRIDENT Controller Kit Neptune A3 Apex Pro System and TRIDENT Controller Kit Neptune A3 Apex Pro System and TRIDENT Controller Kit

    Neptune Systems

    Neptune A3 Apex Pro System and TRIDENT Controller Kit

    Neptune A3 Apex Pro and TRIDENT Controller Kit Ultimate control for any serious control freak. Our A3 Apex Pro System offers the most complete experience of monitoring and control for the discerning aquarist.   Features:  Fully equipped A3 Apex...

    Was: $1,620.98
    Now: $1,377.83
  • Hanna HI98703-01 Turbidity Portable Meter Hanna HI98703-01 Turbidity Portable Meter Hanna HI98703-01 Turbidity Portable Meter

    Hanna Instruments

    Hanna HI98703-01 Turbidity Portable Meter

    Hanna HI98703-01 Turbidity Portable Meter The HI98703 is a high accuracy (±2% of reading plus 0.02 NTU) Turbidity Portable Meter. The meter is supplied complete with AMCO-AEPA-1 primary turbidity standards used for calibration and performance...

    $1,299.99
  • Mastertronic Automated Water Tester Mastertronic Automated Water Tester Mastertronic Automated Water Tester Mastertronic Automated Water Tester Mastertronic Automated Water Tester

    FOCUSTRONIC

    Mastertronic Automated Water Tester

    Mastertronic Automated Water Tester State of the Art Colorimetric Photosensor Water Testing Machine Mastertronic is the latest addition to Focustronics' product range of automated water testing equipment that is capable of measuring Nitrates,...

    $1,299.99
  • HYDROS Maven Auto Water Tester HYDROS Maven Auto Water Tester HYDROS Maven Auto Water Tester HYDROS Maven Auto Water Tester HYDROS Maven Auto Water Tester

    HYDROS Maven Auto Water Tester

    HYDROS Maven Auto Water Tester The HYDROS Maven is a sophisticated aquarium controller designed for saltwater aquariums that can automatically test water parameters. It can automatically test Alkalinity (dKH), Nitrate (NO3), Phosphate (PO4), Calcium...

    Was: $1,199.99
    Now: $1,079.99
  • Hanna HI9146W Portable Dissolved Oxygen O2 Meter for Wine Hanna HI9146W Portable Dissolved Oxygen O2 Meter for Wine

    Hanna Instruments

    Hanna HI9146W Portable Dissolved Oxygen O2 Meter for Wine

    Hanna HI9146W Portable Dissolved Oxygen Meter for Wine The HI9146 is a rugged, portable dissolved oxygen (DO) meter designed to provide laboratory precision and accuracy under harsh environmental and industrial conditions. This meter offers many...

    $969.99
  • Neptune A3 Apex Pro System Kit With Silver Display Neptune A3 Apex Pro System Kit With Silver Display Neptune A3 Apex Pro System Kit With Silver Display Neptune A3 Apex Pro System Kit With Silver Display

    Neptune Systems

    Neptune A3 Apex Pro System Kit With Silver Display

    Neptune A3 Apex Pro System Kit With Silver Display Ultimate control for any serious control freak. Our A3 Apex Pro System offers the most complete experience of monitoring and control for the discerning aquarist.   Features:  Fully equipped A3...

    Was: $1,061.98
    Now: $902.68
  • Alkatronic Alkalinity Controller Alkatronic Alkalinity Controller Alkatronic Alkalinity Controller

    FOCUSTRONIC

    Alkatronic Alkalinity Controller

    Alkatronic Alkalinity Controller The Alkatronic is an all-in-one device that automatically monitors and maintains carbonate hardness values of your aquarium throughout the day. It can dramatically simplify and improve how we manage the KH parameters of...

    Was: $989.99
    Now: $899.99
  • Neptune A3 Apex Pro System Neptune A3 Apex Pro System Neptune A3 Apex Pro System Neptune A3 Apex Pro System

    Neptune Systems

    Neptune A3 Apex Pro System

    Neptune A3 Apex Pro System Ultimate control for any serious control freak. Our A3 Apex Pro System offers the most complete experience of monitoring and control for the discerning aquarist.   Features:  Fully equipped A3 Apex Pro base unit 4...

    Was: $945.99
    Now: $804.09
  • Hanna HI98199 pH, Conductivity, Dissolved Oxygen Meter Hanna HI98199 pH, Conductivity, Dissolved Oxygen Meter Hanna HI98199 pH, Conductivity, Dissolved Oxygen Meter

    Hanna Instruments

    Hanna HI98199 pH, Conductivity, Dissolved Oxygen Meter

    Hanna HI98199 pH, Conductivity, Dissolved Oxygen Meter The HI98199 is a versatile meter that can monitor pH, EC, and dissolved oxygen when paired with the respective probe. Hanna’s pH probe is included  with  the HI98199 and the EC and...

    $799.99
  • Kamoer KH Carer Kamoer KH Carer Kamoer KH Carer Kamoer KH Carer

    Kamoer

    Kamoer KH Carer

    Kamoer KH Carer Test Alkalinity with Confidence! The Kamoer KH Carer is an automatic testing device measuring KH values (Alkalinity) in an aquarium. It includes manual and automatic detection functions. Users can easily view the test results and set...

    $799.99
  • HYDROS X10 Controller & Dosing System HYDROS X10 Controller & Dosing System HYDROS X10 Controller & Dosing System HYDROS X10 Controller & Dosing System HYDROS X10 Controller & Dosing System

    HYDROS

    HYDROS X10 Controller & Dosing System

    HYDROS X10 Controller & Dosing System The Control X10 is the ultimate HYDROS system controller with twin Drive ports, four Sense ports, a pH/ORP port, a Salinity probe port, four stepper dosing motors, and the ability to control up to eight WiFi...

    Was: $799.99
    Now: $719.99
  • Dosetronic Dosing Pump Dosetronic Dosing Pump Dosetronic Dosing Pump Dosetronic Dosing Pump Dosetronic Dosing Pump

    FOCUSTRONIC

    Dosetronic Dosing Pump

    Dosetronic 5 Pump Dosing Station Dosetronic is a truly smart dosing station for the reef aquarium with 5 independent channels that are using high precision stepper motors. When combined with the Alkatronic, the 2 unique functions...

    $714.99
  • Neptune Systems Oxyguard Dissolved Oxygen 02 Probe

    Neptune Systems

    Neptune Systems Oxyguard Dissolved Oxygen 02 Probe

    Neptune Systems Oxyguard Dissolved Oxygen Probe For use with Neptune Systems Apex Controller only.- 0 to 19.9 ppm- Lab quality probe w/10' cable- Temperature, Altitude, and Salinity Compensation- Minidin 6 Connector

    Was: $789.99
    Now: $671.49
  • Trident 2 NP Automatic Nitrate & Phosphate Water Tester - Neptune Systems Trident 2 NP Automatic Nitrate & Phosphate Water Tester - Neptune Systems Trident 2 NP Automatic Nitrate & Phosphate Water Tester - Neptune Systems

    Neptune Systems

    Trident NP - Neptune Systems

    Trident 2 NP Automatic Nitrate & Phosphate Water Tester - Neptune Systems The best selling automated tester ever released has been modified to now test Nitrates and Phosphates with a level of precision, accuracy and ease of use not seen...

    $649.00
  • Hanna HI9147 Portable Galvanic Dissolved Oxygen Meter Hanna HI9147 Portable Galvanic Dissolved Oxygen Meter

    Hanna Instruments

    Hanna HI9147 Portable Galvanic Dissolved Oxygen Meter

    Hanna HI9147 Portable Galvanic Dissolved Oxygen Meter The HI9147 is a rugged, water-resistant dissolved oxygen (DO) meter designed to provide precision and accuracy under harsh environmental conditions. The meter features a manual one point...

    $599.99 - $749.99
  • HYDROS Control X4 / XP8 PRO Pack HYDROS Control X4 / XP8 PRO Pack HYDROS Control X4 / XP8 PRO Pack HYDROS Control X4 / XP8 PRO Pack HYDROS Control X4 / XP8 PRO Pack

    HYDROS

    HYDROS Control X4 / XP8 PRO Pack

    HYDROS Control X4 / XP8 PRO Pack The Ultimate Aquarium Monitoring and Control System The HYDROS Control X4 PRO Pack includes two Control devices, the Control XP8 and Control X4. Combine these Controls to create a secure and impressive set-up for...

    Was: $659.99
    Now: $593.99
  • HYDROS Kraken 24V Power Center HYDROS Kraken 24V Power Center HYDROS Kraken 24V Power Center HYDROS Kraken 24V Power Center HYDROS Kraken 24V Power Center

    HYDROS

    HYDROS Kraken 24V Power Center

    HYDROS Kraken 24V Power Center The Kraken introduces a new concept in aquarium controllers and provides high-power 24V DC switched outputs and a large heavy-duty power supply. This allows “power bricks” and “wall warts” to be removed from aquarium...

    Was: $599.99
    Now: $539.99
  • Neptune A3 Apex System Neptune A3 Apex System Neptune A3 Apex System Neptune A3 Apex System

    Neptune Systems

    Neptune A3 Apex System

    Neptune A3 Apex System Core control and everyday monitoring. The A3 Apex System offers the control but scaled back monitoring with room to grow for the everyday aquarist.   Features:  A3 Apex base unit 3 FMM Ports 6 Switch Digital...

    Was: $629.99
    Now: $535.49
  • HYDROS Launch HYDROS Launch HYDROS Launch HYDROS Launch HYDROS Launch

    HYDROS

    HYDROS Launch

    HYDROS Launch The Launch is the perfect starting point for aquarium control. It measures pH and temperature, controls four outlets, and connects to eight wifi devices. With additional accessories, it can detect leaks, monitor water levels, track...

    Was: $549.99
    Now: $494.99
  • HYDROS Control X3 / XP8 PRO Pack HYDROS Control X3 / XP8 PRO Pack HYDROS Control X3 / XP8 PRO Pack HYDROS Control X3 / XP8 PRO Pack HYDROS Control X3 / XP8 PRO Pack

    HYDROS

    HYDROS Control X3 / XP8 PRO Pack

    HYDROS Control X3 / XP8 PRO Pack The Ultimate Aquarium Monitoring and Control System The HYDROS Control X3 Pro Pack includes two Control devices, the Control XP8 and Control X3. Combine these Controls to create a secure and impressive set-up for...

    Was: $539.99
    Now: $485.99
  • Hanna HI8424 Portable pH/mV Meter

    Hanna Instruments

    Hanna HI8424 Portable pH/mV Meter

    Hanna HI8424 Portable pH/mV Meter The HI8424 is a compact, waterproof, portable pH/mV/temperature meter that is supplied complete with a protective carrying case, PEI plastic body pH electrode, stainless steel temperature probe, calibration buffer...

    $429.99
  • Seneye Pond Pack with Dri Box and WiFi Web Server Seneye Pond Pack with Dri Box and WiFi Web Server Seneye Pond Pack with Dri Box and WiFi Web Server Seneye Pond Pack with Dri Box and WiFi Web Server Seneye Pond Pack with Dri Box and WiFi Web Server

    Seneye

    Seneye Pond Pack with Dri Box and WiFi Web Server

    Seneye Pond Pack with Dri Box and WiFi Web Server Ever found you have lost a Koi but didn’t know why? Have your had a pond leak, but found out too late? seneye Pond makes it easy for you to monitor your pond and protect your fish. The seneye can...

    Was: $499.00
    Now: $424.15
  • Seneye Reef Pack with Dri Box and WiFi Web Server Seneye Reef Pack with Dri Box and WiFi Web Server Seneye Reef Pack with Dri Box and WiFi Web Server Seneye Reef Pack with Dri Box and WiFi Web Server Seneye Reef Pack with Dri Box and WiFi Web Server

    Seneye

    Seneye Reef Pack with Dri Box and WiFi Web Server

    Seneye Reef Pack with Dri Box and WiFi Web Server Are your corals not as vibrant as you expect? Have you ever had an aquarium crash unexpectedly? Now with the seneye Reef you can continuously monitor and analyze key life-critical parameters in your...

    Was: $499.00
    Now: $424.15
  • HYDROS Control X4 Starter Pack HYDROS Control X4 Starter Pack HYDROS Control X4 Starter Pack HYDROS Control X4 Starter Pack HYDROS Control X4 Starter Pack

    HYDROS

    HYDROS Control X4 Starter Pack

    HYDROS Control 4 Starter Pack Achieve Ultimate Aquarium Control with the HYDROS Control 4 Starter Pack This starter kit includes all essential equipment needed to monitor and control a healthy aquarium including a Control 4 device, HYDROS App,...

    Was: $449.99
    Now: $404.99
  • COR-20 Water Pump - Neptune Systems COR-20 Water Pump - Neptune Systems COR-20 Water Pump - Neptune Systems COR-20 Water Pump - Neptune Systems COR-20 Water Pump - Neptune Systems

    Neptune Systems

    COR-20 Water Pump - Neptune Systems

    COR20 Intelligent Return Pump - Neptune Systems Your return pump is by far the most important piece of equipment on your aquarium. It circulates the water which is basically the life-blood of a tank. Creating a great aquarium is just like building a...

    Was: $399.99
    Now: $339.99
  • Reef Delete V1.02 Reef Delete V1.02

    Seneye

    Reef Delete V1.02

    Reef Delete ITC Reefculture V1.02 New Version The perfect reef aquarium is free of pests. Nothing to sting, eat or smother your beautiful corals! However, every reef aquarist knows that this isn’t always the case!   Reef Delete  is like having...

    Was: $399.99
    Now: $339.99
  • HYDROS Control X4 (Controller Only) HYDROS Control X4 (Controller Only) HYDROS Control X4 (Controller Only) HYDROS Control X4 (Controller Only)

    HYDROS

    HYDROS Control X4 (Controller Only)

    HYDROS Control X4 (Controller Only) Achieve Ultimate Aquarium Control with the HYDROS Control 4 HYDROS Control 4 is a powerful and robust aquarium controller capable of performing all essential functions needed to maintain a healthy aquarium without...

    Was: $349.99
    Now: $314.99
  • DOS 2.0 Quiet Drive Automatic Dosing System - Neptune System

    Neptune Systems

    DOS 2.0 Quiet Drive Automatic Dosing System - Neptune System

    Neptune System DOS 2.0 Quiet Drive Automatic Dosing System DŌS QuietDrive - Dose. Automate. Protect. New QuietZone Modes for Reduced Noise New Continuous Duty Modes Same Reliable DŌS Hardware Compatible with A2 and A3 Series Apex Controllers   In...

    Was: $349.99
    Now: $297.49
  • COR-15 Water Pump - Neptune Systems COR-15 Water Pump - Neptune Systems COR-15 Water Pump - Neptune Systems COR-15 Water Pump - Neptune Systems COR-15 Water Pump - Neptune Systems

    Neptune Systems

    COR-15 Water Pump - Neptune Systems

    COR15 Intelligent Return Pump - Neptune Systems Your return pump is by far the most important piece of equipment on your aquarium. It circulates the water which is basically the life-blood of a tank. Creating a great aquarium is just like building a...

    Was: $339.99
    Now: $288.99
  • Neptune Systems PMK PAR Monitoring Kit Neptune Systems PMK PAR Monitoring Kit Neptune Systems PMK PAR Monitoring Kit

    Neptune Systems

    Neptune Systems PMK PAR Monitoring Kit

    Neptune Systems PMK PAR Monitoring Kit FeaturesFeatures and Benefits: Performs continuous light-level monitoring for your aquarium Measures actual PAR – the light corals and plants use Prevents burning out corals Includes ASM – the new...

    Was: $339.99
    Now: $288.99
  • HYDROS Control X3 Monitor Pack HYDROS Control X3 Monitor Pack HYDROS Control X3 Monitor Pack HYDROS Control X3 Monitor Pack HYDROS Control X3 Monitor Pack

    HYDROS

    HYDROS Control X3 Monitor Pack

    HYDROS Control X3 Monitor Pack The Ultimate Aquarium Monitoring System The HYDROS Control X3 Monitor Pack includes all essential equipment needed to monitor a healthy aquarium including the Control X3 aquarium controller, HYDROS App, temperature...

    Was: $299.99
    Now: $269.99
  • HYDROS Control X3 Starter Pack HYDROS Control X3 Starter Pack HYDROS Control X3 Starter Pack HYDROS Control X3 Starter Pack HYDROS Control X3 Starter Pack

    HYDROS

    HYDROS Control X3 Starter Pack

    HYDROS Control X3 Starter Pack Achieve Ultimate Aquarium Control with the HYDROS Control X3 Starter Pack This starter kit includes all essential equipment needed to monitor and control a healthy aquarium including a Control X3 device, HYDROS App,...

    Was: $299.99
    Now: $269.99
  • HYDROS Sole Controller HYDROS Sole Controller HYDROS Sole Controller HYDROS Sole Controller HYDROS Sole Controller

    HYDROS Sole Controller

    HYDROS Sole Controller The HYDROS Sole is an aquarium controller hybrid with a heavy-duty liquid dosing pump designed for continuous dosing tasks in saltwater and freshwater aquariums. It can be used independently or with other HYDROS devices. Controller...

    Was: $299.99
    Now: $269.99