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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.

  • Red Sea MCP Test Kit Marine Care Master Red Sea MCP Test Kit Marine Care Master

    Red Sea

    Red Sea MCP Test Kit Marine Care Master

    Red Sea MCP Test Kit Marine Care Master.The Red Sea Marine Care Program Marine Care Test Kit includes easy to use tests for the accurate monitoring of all of the important parameters during the biological maturation of marine reef aquariums. Includes:...

    $74.99
  • Seneye Leak Detector Sensor Seneye Leak Detector Sensor

    Seneye

    Seneye Leak Detector Sensor

    Seneye Leak Detector Sensor What could be worse for your fish than no water in the tank and a wet carpet? The Seneye Leak Detector will help you make sure that never happens. The new Seneye Leak Detector is the latest expansion to the Seneye monitoring...

    $74.00
  • Alkalinity Testing Reagent - 4L Concentrated

    CoralVue

    Alkalinity Testing Reagent - 4L Concentrated

    Alkalinity Testing Reagent - 4L Concentrated Concentrated Reagent Specifically for Alkalinity Testing Machines A concentrated reagent for both Focustronic Alkatronic and Kamoer KH Carer.  (See mixing instructions below) Kamoer KH Carer Mixing...

    $69.99
  • Neptune Systems Lunar Simulator LEDs (5)

    Neptune Systems

    Neptune Systems Lunar Simulator LEDs (5)

    Neptune Systems Lunar Simulator LEDs (5)Want to more accurately simulate the natural environment for your tank inhabitants?Moonlight in the ocean is believed to be as significant as the time spent in full daylight. Moonlight triggers various internal and...

    $69.99
  • HYDROS 1" Flow Sensor HYDROS 1" Flow Sensor HYDROS 1" Flow Sensor HYDROS 1" Flow Sensor

    HYDROS

    HYDROS 1" Flow Sensor

    HYDROS 1" Flow Sensor Flow Range: 50-1500gphWire Length: 8ft Includes schedule 80 PVC Unions Monitor Passing Water Flow The HYDROS Flow Sensors are easy-to-install flow meters that communicate to the HYDROS app the flow rate of water passing through...

    $64.99
  • HYDROS 9in USB LED Sign HYDROS 9in USB LED Sign

    HYDROS

    HYDROS 9in USB LED Sign

    HYDROS 9in USB LED Sign Enhance the appearance of your aquarium controller display using a USB LED sign from HYDROS. Easily mountable to any surface using mounting tape or screws (not provided), the HYDROS 9in USB LED Back-Lit Sign is an ideal addition...

    $64.99
  • Neptune Systems LLS Liquid Level Sensor - 15 Inch Neptune Systems LLS Liquid Level Sensor - 15 Inch Neptune Systems LLS Liquid Level Sensor - 15 Inch

    Neptune Systems

    Neptune Systems LLS Liquid Level Sensor - 15 Inch

    Neptune Systems LLS Liquid Level Sensor - 15 Inch The Neptune LLS is a first of its kind industry exclusive! While most liquid level sensors simply measure the presence or absence of liquid at a predetermined  sensor height, the LLS is one continuous...

    $64.99
  • ATI ICP-MS Premium Water Analysis - US Version

    ATI

    ATI ICP-MS Premium Water Analysis - US Version

    ATI ICP-MS Premium Water Analysis - US Version The ATI ICP-MS Premium Water Analysis is a laboratory water analysis of 50 parameters in a reef tank that provides a complete overview of a tank's health, which is impossible with traditional test...

    $64.95
  • HYDROS Dosing Pump HYDROS Dosing Pump HYDROS Dosing Pump HYDROS Dosing Pump HYDROS Dosing Pump

    HYDROS

    HYDROS Dosing Pump

    HYDROS Dosing Pump The HYDROS Dosing Pump is a simple and affordable way to automate the addition of liquid supplements, trace elements, and two-part solutions to an aquarium. Connect the Dosing Pump to any available HYDROS Control Drive Port for easy...

    $62.99
  • HYDROS 3/4" Flow Sensor HYDROS 3/4" Flow Sensor HYDROS 3/4" Flow Sensor HYDROS 3/4" Flow Sensor

    HYDROS

    HYDROS 3/4" Flow Sensor

    HYDROS 3/4" Flow Sensor Flow Range: 40-800gphWire Length: 8ft Includes schedule 80 PVC Unions Monitor Passing Water Flow The HYDROS Flow Sensors are easy-to-install flow meters that communicate to the HYDROS app the flow rate of water passing through...

    $61.99
  • AutoAqua Smart Level Security AutoAqua Smart Level Security AutoAqua Smart Level Security AutoAqua Smart Level Security AutoAqua Smart Level Security

    AutoAqua

    AutoAqua Smart Level Security

    AutoAqua Smart Level Security Smart Level Security by AutoAqua prevents aquariums from overflowing or equipment from running dry. Magnetically coupled optical sensor mounts up to smooth surfaces 1/2 inch thick. A...

    $59.99
  • D-D True Seawater Refractometer

    DD The Aquarium Solution

    D-D True Seawater Refractometer

    D-D True Seawater Refractometer Hand held instrument for the measurement of the TRUE Salinity and Specific Gravity (S.G.) of sea water by refractive index. What is different about the D-D Seawater Refractometer? Almost all hand held salt water...

    $59.99
  • Neptune Systems Lunar Simulator LEDs (4)

    Neptune Systems

    Neptune Systems Lunar Simulator LEDs (4)

    Neptune Systems Lunar Simulator LEDs (4)Want to more accurately simulate the natural environment for your tank inhabitants?Moonlight in the ocean is believed to be as significant as the time spent in full daylight. Moonlight triggers various internal and...

    $59.99
  • Neptune Systems Power Supply for 1LINK Module

    Neptune Systems

    Neptune Systems Power Supply for 1LINK Module

    Neptune Systems Power Supply for 1LINK Module 1Link- Power Supply 24v Power supply for the Neptune Systems 1Link ONLY. Neptune Systems Power Supply for 1LINK Module 1Link- Power Supply 24v Power supply for the Neptune Systems 1Link ONLY...

    $59.99
  • Neptune Trident NP: 2-month Kit Neptune Trident NP: 2-month Kit Neptune Trident NP: 2-month Kit Neptune Trident NP: 2-month Kit

    Neptune Systems

    Neptune Trident NP: 2-month Kit

    Neptune Trident NP: 2-month Kit Keep your Trident NP Nitrate and Phosphate Tester running smoothly by replacing your reagents on time. This kit is easy to use with clear instructions for hassle-free reagent changes. These reagents ensure consistent and...

    $59.99
  • Smart Temp Security Smart Temp Security

    AutoAqua

    Smart Temp Security

    Smart Temp Security Smart Temp Security controls an aquarium heater or chiller within a range of 72℉ to 84℉. A magnetically coupled optical sensor mounts to most smooth surfaces up to 1/2 inch thick.    Plug&Play -...

    $59.99
  • Seneye Magnetic Holder Pro Seneye Magnetic Holder Pro

    Seneye Magnetic Holder Pro

    Seneye Magnetic Holder Pro The seneye magnetic holder pro is for those hobbyists who keep tanks with glass as thick as 16mm! these slim line holders fix your seneye in place allowing you to monitor your water level where ever you are in the world. The...

    $59.00
  •   Hanna HI700 Ammonia Checker - Low range - Freshwater   Hanna HI700 Ammonia Checker - Low range - Freshwater   Hanna HI700 Ammonia Checker - Low range - Freshwater   Hanna HI700 Ammonia Checker - Low range - Freshwater

    Hanna Instruments

    Hanna HI700 Ammonia Checker - Low range - Freshwater

    Hanna Ammonia Checker, Low range HI700 The all new HI 700 Checker Ammonia LR for fresh water can be used in place of HI 3824 or HI 38049 fresh water test kits. The  Checker®HC is a simple, accurate, and cost effective way to measure low ranges...

    Was: $67.99
    Now: $57.79
  •  Hanna HI702 High Range Copper Checker  Hanna HI702 High Range Copper Checker  Hanna HI702 High Range Copper Checker  Hanna HI702 High Range Copper Checker

    Hanna Instruments

    Hanna HI702 High Range Copper Checker

    Hanna High Range Copper Checker - HI702 The HI702 Checker®HC (Handheld Colorimeter) is a simple, accurate, and cost effective way to measure high ranges of copper. Designed as a more accurate alternative to chemical test kits, the HI702 provides...

    Was: $67.99
    Now: $57.79
  • Hanna HI713 Phosphate Checker Hanna HI713 Phosphate Checker Hanna HI713 Phosphate Checker

    Hanna Instruments

    Hanna HI713 Phosphate Checker

    Hanna Phosphate Checker HI713 The HANNA HI 713 CheckerHC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give only a few resolution points while professional...

    Was: $67.99
    Now: $57.79
  • Hanna HI721 Iron Checker Hanna HI721 Iron Checker Hanna HI721 Iron Checker

    Hanna Instruments

    Hanna HI721 Iron Checker

    Hanna Iron Checker HI721 For use in fresh and saltwater The new HI 721 Checker HC portable handheld colorimeter features a resolution of 0.01 ppm (500 points) and 0.04 ppm 2% of reading accuracy. The HI 721 CheckerHC uses an adaptation of Standard...

    Was: $67.99
    Now: $57.79
  •  Hanna HI736 Phosphorous Checker, Ultra Low Range   Hanna HI736 Phosphorous Checker, Ultra Low Range   Hanna HI736 Phosphorous Checker, Ultra Low Range   Hanna HI736 Phosphorous Checker, Ultra Low Range

    Hanna Instruments

    Hanna HI736 Phosphorous Checker, Ultra Low Range

    Hanna Phosphorous Checker, Ultra Low Range HI736 The HANNA HI 736 Checker HC bridges the gap between simple chemical test kits and professional instrumentation. The HANNA HI?736 is both accurate and affordable.The HI 736 CheckerHC portable handheld...

    Was: $67.99
    Now: $57.79
  •  Hanna HI764 Nitrite Checker, Ultra Low Range  Hanna HI764 Nitrite Checker, Ultra Low Range  Hanna HI764 Nitrite Checker, Ultra Low Range  Hanna HI764 Nitrite Checker, Ultra Low Range

    Hanna Instruments

    Hanna HI764 Nitrite Checker, Ultra Low Range

    Hanna Nitrite Checker, Ultra Low Range HI764 The HANNA HI 764 Checker HC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate while professional instrumentation can cost hundreds of...

    Was: $67.99
    Now: $57.79
  • Hanna HI772 Marine Alkalinity dKH Checker Hanna HI772 Marine Alkalinity dKH Checker Hanna HI772 Marine Alkalinity dKH Checker

    Hanna Instruments

    Hanna HI772 Marine Alkalinity dKH Checker

    Hanna Marine Alkalinity dKH Checker HI772 Features at-a-glance: Easier to use and more accurate than chemical test kits Dedicated to a single parameter Small size, big convenience Ideal for: Aquaculture & Aquariums, Water Quality  HI772...

    Was: $67.99
    Now: $57.79
  •  Hanna HI774 Ultra Low Range Phosphate Checker - Marine  Hanna HI774 Ultra Low Range Phosphate Checker - Marine

    Hanna Instruments

    Hanna HI774 Ultra Low Range Phosphate Checker - Marine

    Hanna HI774 Ultra Low Range Phosphate Checker - Marine Our HI774 Ultra Low Range Phosphate Checker will be essentially the same specifications as the HI736 Ultra Low Range Phosphorus Checker however it will not require a conversion but read directly in...

    Was: $67.99
    Now: $57.79
  •  Hanna HI780 Marine pH Checker  Hanna HI780 Marine pH Checker  Hanna HI780 Marine pH Checker

    Hanna Instruments

    Hanna HI780 Marine pH Checker

     Hanna HI780 Marine pH Checker Get accurate water testing results with the HI780 Marine pH Colorimeter. With a digital read out, there is no more struggling to determine colors visually. This pH tester's compact design fits in your pocket or stores...

    Was: $67.99
    Now: $57.79
  • Hanna HI718 Iodine Checker Hanna HI718 Iodine Checker Hanna HI718 Iodine Checker

    Hanna Instruments

    Hanna HI718 Iodine Checker

    Hanna Iodine Checker HI718 ***FRESHWATER ONLY*** Hanna Iodine Checker HI718 is extremely simple to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the instrument, press the button and read...

    Was: $67.99
    Now: $57.79
  • Hanna HI758 Marine Calcium Checker Hanna HI758 Marine Calcium Checker Hanna HI758 Marine Calcium Checker Hanna HI758 Marine Calcium Checker

    Hanna Instruments

    Hanna HI758 Marine Calcium Checker

    Hanna Marine Calcium Checker HI758 Calcium presence in water supplies results from passage over deposits of limestone, dolomite, gypsum and gypsiferous shale. Its concentration may extend from 0 to several hundred milligrams per liter,depending on its...

    Was: $67.99
    Now: $57.79
  • Hanna HI781 Marine Nitrate Low Range Checker Hanna HI781 Marine Nitrate Low Range Checker Hanna HI781 Marine Nitrate Low Range Checker

    Hanna Instruments

    Hanna HI781 Marine Nitrate Low Range Checker

    Hanna HI781 Marine Nitrate Low Range Checker Get highly accurate results with the HI781 Marine Nitrate Low Range Colorimeter. With a digital read out, there is no more struggling to determine colors visually. This nitrate tester's compact design...

    Was: $67.99
    Now: $57.79
  • Hanna HI782 Marine High Range Nitrate Checker Hanna HI782 Marine High Range Nitrate Checker Hanna HI782 Marine High Range Nitrate Checker

    Hanna Instruments

    Hanna HI782 Marine High Range Nitrate Checker

    Hanna HI782 Marine High Range Nitrate Checker The HI782 Marine Nitrate High Range Colorimeter is specifically designed to quickly and accurately determine high levels of nitrate for saltwater aquariums and marine applications. With a digital readout,...

    Was: $67.99
    Now: $57.79
  • Hanna HI783 Marine Magnesium Checker Hanna HI783 Marine Magnesium Checker Hanna HI783 Marine Magnesium Checker

    Hanna Instruments

    Hanna HI783 Marine Magnesium Checker

    Hanna HI783 Marine Magnesium Checker Our Marine Magnesium Checker® HC (HI783) is designed to accurately and quickly determine the magnesium level in marine (saltwater) samples. The digital readout makes measurements effortless. Range: 1,000 to 1,800...

    Was: $67.99
    Now: $57.79
  • Hanna HI784 Marine Ammonia Checker Hanna HI784 Marine Ammonia Checker Hanna HI784 Marine Ammonia Checker

    Hanna Instruments

    Hanna HI784 Marine Ammonia Checker

    Hanna HI784 Marine Ammonia Checker The HI784 Marine Ammonia Checker HC is a handheld colorimeter that uses the Beer-Lambert principle to determine the concentration of ammonia colorimetrically. The HI784 is designed specifically to measure ammonia...

    Was: $67.99
    Now: $57.79
  • HYDROS Dual Inline TDS Sensor HYDROS Dual Inline TDS Sensor HYDROS Dual Inline TDS Sensor

    HYDROS

    HYDROS Dual Inline TDS Sensor

    HYDROS Dual Inline TDS Sensor Monitor your RO/DI units' water quality with HYDROS Dual Inline TDS Sensor. Plugs directly into any HYDROS Control with an available Sense Port and does not require any additional power source.    Dual Inline TDS...

    $52.49
  • Hanna Checktemp® 1 Digital Thermometer - HI98509 Hanna Checktemp® 1 Digital Thermometer - HI98509

    Hanna Instruments

    Hanna Checktemp® 1 Digital Thermometer - HI98509

    Hanna Checktemp® 1 Digital Thermometer - HI98509 The HI98509 Checktemp® 1 is a high-accuracy thermometer with a 1 m (3.3') flexible, silicone cable connecting the meter and the stainless steel probe. The sharp-tip penetration probe easily...

    Was: $59.99
    Now: $50.99
  • Hanna Instruments - Checker Plus pH Tester HI98100 Plus Hanna Instruments - Checker Plus pH Tester HI98100 Plus Hanna Instruments - Checker Plus pH Tester HI98100 Plus Hanna Instruments - Checker Plus pH Tester HI98100 Plus

    Hanna Instruments

    Hanna Instruments - Checker Plus pH Tester HI98100 Plus

    Hanna Instruments - Checker Plus pH Tester HI98100 Plus The HI98100 Checker Plus is the next generation of the original Hanna Checker pH tester. The Checker is the most popular pH meter in the world with over 1 million meters used since its introduction...

    Was: $59.99
    Now: $50.99
  • AutoAqua Smart Skimmer Security AutoAqua Smart Skimmer Security AutoAqua Smart Skimmer Security AutoAqua Smart Skimmer Security AutoAqua Smart Skimmer Security

    AutoAqua

    AutoAqua Smart Skimmer Security

    AutoAqua Smart Skimmer Security AutoAqua's Smart Skimmer Security prevents protein simmer from overflowing. Magnetically coupled optical sensor mounts up to smooth surfaces 1/2 inch thick.Skimmer Security Made Simple Smart Skimmer...

    $59.99
    Was: $59.99
    Now: $49.99
  • Fauna Marin Reef ICP TOTAL Test (Single Test) Fauna Marin Reef ICP TOTAL Test (Single Test)

    ATI

    Fauna Marin Reef ICP TOTAL Test (Single Test)

    Fauna Marin Reef ICP TOTAL Test (Single Test) Simple, Fast, and Precise ICP Testing with Prepaid Shipping Label The Fauna Marin Reef ICP TOTAL Test provides a fast, accurate, and user-friendly overview of more than 90 water parameters in reef aquariums...

    $49.99
  • Neptune Trident Two-Month Reagent Kit

    Neptune Systems

    Neptune Trident Two-Month Reagent Kit

    Neptune Trident Two-Month Reagent Kit Neptune Systems recommends keeping on hand no more Trident reagent than you might expect to consume within the next 12 months.  2-month reagent kit (based on the default testing schedule of 4-Alk/2-Ca/2-Mg per...

    $49.99
  • Pinpoint pH Probe, Double Junction, Lab Grade

    Pinpoint - American Marine

    Pinpoint pH Probe, Double Junction, Lab Grade

    Pinpoint pH Probe, Double Junction, Lab Grade Replacement pH probe for Pinpoint pH monitors and controllers. Pinpoint pH Probe. Replacement pH probe for Pinpoint pH monitors and controllers. Product code: 1307Item No. TE-AMPP-01050

    $49.99
  • Triton ICP-OES Testing Kit Triton ICP-OES Testing Kit

    Triton

    Triton ICP-OES Testing Kit

    Triton ICP-OES Testing Kit We have been utilizing Triton's ICP-OES testing system for some time with aquariums, additives, and almost any other liquid that we have wanted to know what is in it exactly. Triton now gives you the ability to know what is in...

    $49.00
  • Triton N-DOC Organics Test Kit

    Triton

    Triton N-DOC Organics Test Kit

    Triton N-DOC Organics Test Kit Application:  Deliver insights into complex organic systems in seawater: Carbon and Nitrogen Use N/C/P ratio to manage sources of Carbon / Amino acid and control their influence on bacteria and corals in reef...

    $49.00
  • Neptune Systems I/O Break Out Box

    Neptune Systems

    Neptune Systems I/O Break Out Box

    Neptune Systems I/O Break Out Box Easily add float switches, water on the floor sensors, etc. to the APEX, AquaController 3 or AquaController 3 Pro. Simply plug the Breakout box's minidin 8 cable into the AquaController I/O port, and then attach the...

    $47.99
  • Neptune Systems LLS Liquid Level Sensor - 4 Inch Neptune Systems LLS Liquid Level Sensor - 4 Inch Neptune Systems LLS Liquid Level Sensor - 4 Inch

    Neptune Systems

    Neptune Systems LLS Liquid Level Sensor - 4 Inch

    Neptune Systems LLS Liquid Level Sensor - 4 Inch The Neptune LLS is a first of its kind industry exclusive! While most liquid level sensors simply measure the presence or absence of liquid at a predetermined  sensor height, the LLS is one continuous...

    $47.99
  • Neptune Systems Lunar Simulator LEDs (3)

    Neptune Systems

    Neptune Systems Lunar Simulator LEDs (3)

    Neptune Systems Lunar Simulator LEDs (3)Want to more accurately simulate the natural environment for your tank inhabitants?Moonlight in the ocean is believed to be as significant as the time spent in full daylight. Moonlight triggers various internal and...

    $47.99
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