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At AquaCave, we offer some of the best selection and best prices on Neptune Control Hardware, Modules, Probes, Cables and accessories for you marine, reef, and freshwater aquarium.

60 of 88 Items
  • 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 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...

    $669.99
  • Neptune Systems Apex Dosing Combo DOS QD, DDR & Tubing Neptune Systems Apex Dosing Combo DOS QD, DDR & Tubing Neptune Systems Apex Dosing Combo DOS QD, DDR & Tubing Neptune Systems Apex Dosing Combo DOS QD, DDR & Tubing Neptune Systems Apex Dosing Combo DOS QD, DDR & Tubing

    Neptune Systems

    Neptune Systems DOS QD + DDR Dosing Combo

    Neptune Systems DOS QD + DDR Dosing Combo 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 the most...

    $565.98
  • 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...

    $449.99
  • 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...

    $399.99
  • Neptune Systems EnergyBar EB-832 Neptune Systems EnergyBar EB-832 Neptune Systems EnergyBar EB-832 Neptune Systems EnergyBar EB-832 Neptune Systems EnergyBar EB-832

    Neptune Systems

    Neptune Systems EnergyBar EB-832

    Neptune Systems Energy-Bar 832 8 Independently Controllable Outlets Individual Outlet Power Monitoring Two 24VDC Accessory Ports Three 1Link Ports Three AquaBus Ports   The Neptune Systems Energy Bar 832 (EB832) is designed as an ultimate power...

    $359.99
  • 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...

    $339.99
  • ATK v2 - Automatic Top-Off Kit - Neptune Systems ATK v2 - Automatic Top-Off Kit - Neptune Systems

    Neptune Systems

    ATK v2 - Automatic Top-Off Kit - Neptune Systems

    ATK v2 - Automatic Top-Off Kit - Neptune Systems Auto Top Off Kit (Version 2) (ATKv2) The ATKv2 (Automatic Top-off Kit) is a simple, standalone, and complete solution for replacing water lost to evaporation. The kit includes: FMM Module (Runs...

    $269.99
  • Neptune Systems FMK Flow Monitoring Kit Neptune Systems FMK Flow Monitoring Kit Neptune Systems FMK Flow Monitoring Kit Neptune Systems FMK Flow Monitoring Kit Neptune Systems FMK Flow Monitoring Kit

    Neptune Systems

    Neptune Systems FMK Flow Monitoring Kit

    Neptune Systems Flow Monitoring Kit (FMM, (2) FS-50, (4) 1/2" Adapters, (1) FS-100, (2) 1" union START MONITORING FLOW IN YOUR AQUARIUM. THIS KIT INCLUDES: FMM - FLUID MONITORING MODULE 1'' FLOW SENSOR (FS-100) TWO 1/2'' FLOW SENSORS...

    $259.99
  • Neptune Systems DDR Dual Reservoir Neptune Systems DDR Dual Reservoir Neptune Systems DDR Dual Reservoir Neptune Systems DDR Dual Reservoir Neptune Systems DDR Dual Reservoir

    Neptune Systems

    Neptune Systems DDR Dual Reservoir

    Neptune Systems DDR Dual Reservoir This attractive fluid containment system stores your dosing fluids in style and even tells you when it’s time to refill! Each side stores two liters (2L) of fluid Connects directly to your DŌS Optical...

    $259.99
  • Neptune Systems Replacement PAR Sensor Neptune Systems Replacement PAR Sensor Neptune Systems Replacement PAR Sensor

    Neptune Systems

    Neptune Systems Replacement PAR Sensor

    Neptune Systems Replacement PAR Sensor Features 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 Advanced...

    $209.99
  • Neptune Systems 1LINK Power and Communication Module Neptune Systems 1LINK Power and Communication Module Neptune Systems 1LINK Power and Communication Module

    Neptune Systems

    Neptune Systems 1LINK Power and Communication Module

    Neptune Systems 1LINK Power and Communication Module 1LINK™ – Easy, one-click installation The WAV is the first of a line of aquarium products from Neptune Systems that will use a completely new interface. While many in the aquarium...

    $199.99
  • LDK Leak Detection Kit - Neptune Systems LDK Leak Detection Kit - Neptune Systems LDK Leak Detection Kit - Neptune Systems LDK Leak Detection Kit - Neptune Systems

    Neptune Systems

    LDK Leak Detection Kit - Neptune Systems

    LDK Leak Detection Kit - Neptune Systems Detecting a leak early can be the difference between saving a tank to an entire loss. Neptune's Leak Detection Kit is the perfect solution for anyone that uses an Apex Controller to monitor and control their...

    $189.99
  • Neptune GRO Refugium Light with Flat Bracket Mount Neptune GRO Refugium Light with Flat Bracket Mount Neptune GRO Refugium Light with Flat Bracket Mount Neptune GRO Refugium Light with Flat Bracket Mount Neptune GRO Refugium Light with Flat Bracket Mount

    Neptune Systems

    Neptune GRO Refugium Light with Flat Bracket Mount

    Neptune GRO Refugium Light with Flat Bracket Mount Support Natural Filtration with the GRO Compact and efficient light output 84 LEDs, optimum growth spectrum Large surface with even distribution IP64 Water resistant design Can operate standalone...

    $179.99
  • Neptune GRO Refugium Light with Pipe Mount Neptune GRO Refugium Light with Pipe Mount Neptune GRO Refugium Light with Pipe Mount Neptune GRO Refugium Light with Pipe Mount Neptune GRO Refugium Light with Pipe Mount

    Neptune Systems

    Neptune GRO Refugium Light with Pipe Mount

    Neptune GRO Refugium Light with Pipe Mount Compact and efficient light output 84 LEDs, optimum growth spectrum Large surface with even distribution IP64 Water resistant design Can operate standalone with optional power supply Includes gooseneck and...

    $179.99
  • Neptune Systems Energy Bar 4

    Neptune Systems

    Neptune Systems Energy Bar 4

    Neptune Systems Energy Bar 4   The EnergyBar 4 / EB-4 module features 4 independently controllable outlets. With power failure detection, active electrical current monitoring, and failsafe features make this power bar far better than any competing units...

    $149.99
  • Neptune Systems ADM Apex Display Module

    Neptune Systems

    Neptune Systems ADM Apex Display Module

    Neptune Systems ADM Apex Display Module Apex Display Module-ADM The Apex Display module is a sleek and compact way for your to interact with the Apex Base Unit and control nearly every aspect of your Aquarium. Mechanical, not membrane keypad Our...

    $141.99
  • Neptune Systems AFS Automatic Feeding System Neptune Systems AFS Automatic Feeding System Neptune Systems AFS Automatic Feeding System Neptune Systems AFS Automatic Feeding System Neptune Systems AFS Automatic Feeding System

    Neptune Systems

    Neptune Systems AFS Automatic Feeding System

    Neptune Systems AFS Automatic Feeding System Great things happen when you combine the functionality of our proven Apex AquaController and the mechanics of a great autofeeding mechanism. It has long been known that feeding smaller amounts, more often, is...

    $139.99
  • Neptune Systems Flow Sensor - 2" with unions - FS200

    Neptune Systems

    Neptune Systems Flow Sensor - 2" with unions - FS200

    Neptune Systems Flow Sensor - 2" with unions - FS200 Usually used with a return pump, this flow sensor can be placed in line with the flow on any pipe, connected to the FMM, and communicate to your Apex the flow rate of water through that pipe. The...

    $139.99
  • Neptune Systems Fluid Monitoring Module - FMM Neptune Systems Fluid Monitoring Module - FMM Neptune Systems Fluid Monitoring Module - FMM

    Neptune Systems

    Neptune Systems Fluid Monitoring Module - FMM

    Neptune Systems Fluid Monitoring Module - FMM Neptune Systems FMM Fluid Monitoring Module Flow Monitoring Leak Detection Water Level Management DC24 Accessory Port   The Neptune Systems FMM Fluid Monitoring Module offers practical solutions for...

    $139.99
  • Neptune Systems MXM Mobius Wireless Control Module Neptune Systems MXM Mobius Wireless Control Module Neptune Systems MXM Mobius Wireless Control Module

    Neptune Systems

    Neptune Systems MXM Mobius Wireless Control Module

    Neptune Systems MXM Mobius Wireless Control Module The new Neptune MXM Mobius Wireless Control Module will allow users to integrate and manage Ecotech Marine and Aqua Illumination equipment using an Apex Controller. Use the Apex Fusion interface to...

    $139.99
  • Apex Controller Toggle Box Apex Controller Toggle Box Apex Controller Toggle Box Apex Controller Toggle Box Apex Controller Toggle Box

    Neptune Systems

    Apex Controller Toggle Box

    Apex Controller Toggle Box Adaptive Reef in conjunction with Harry's Aquatics is pleased to bring a full line of products designed to work with and enhance the user experience with aquarium controllers. From switch control boxes and 0-10v based devices...

    $134.99
  • Neptune Systems LLS Liquid Level Sensor - 35 Inch Neptune Systems LLS Liquid Level Sensor - 35 Inch Neptune Systems LLS Liquid Level Sensor - 35 Inch

    Neptune Systems

    Neptune Systems LLS Liquid Level Sensor - 35 Inch

    Neptune Systems LLS Liquid Level Sensor - 35 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...

    $129.99
  • Neptune Trident Six-Month Reagent Kit Neptune Trident Six-Month Reagent Kit

    Neptune Systems

    Neptune Trident Six-Month Reagent Kit

    Neptune Trident Six-Month Reagent Kit Neptune System's Replacement Reagent Kit comes with everything you need to change out the reagents for the Trident Marine Water Analyzing System. Each kit comes with new bottles that can be placed directly into the...

    $109.99
  • Neptune Systems LLS Liquid Level Sensor - 23 Inch Neptune Systems LLS Liquid Level Sensor - 23 Inch Neptune Systems LLS Liquid Level Sensor - 23 Inch

    Neptune Systems

    Neptune Systems LLS Liquid Level Sensor - 23 Inch

    Neptune Systems LLS Liquid Level Sensor - 23 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...

    $99.99
  • Neptune Systems LSM Lunar Simulator Module

    Neptune Systems

    Neptune Systems LSM Lunar Simulator Module

    Neptune Systems LSM Lunar Simulator Module. 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...

    $89.99
  • 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...

    $89.99
  • Neptune Systems Flow Sensor - 1" with unions - FS100

    Neptune Systems

    Neptune Systems Flow Sensor - 1" with unions - FS100

    Neptune Systems Flow Sensor - 1" with unions - FS100 Usually used with a return pump, this flow sensor can be placed in line with the flow on any pipe, connected to the FMM, and communicate to your Apex the flow rate of water through that pipe. The...

    $79.99
  • 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...

    $79.99
  • 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...

    $79.99
  • 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...

    $69.99
  •  Neptune Systems MPR Apex Magnetic Probe Holder

    Neptune Systems

    Neptune Systems MPR Apex Magnetic Probe Holder

    Neptune Apex Magnetic Probe HolderThe little new product we promised. It may be little, but it has been in demand for a long time. The MPR - Magnetic Probe Rack was designed specifically for the Apex and will hold our larger diameter temperature probe,...

    $59.99
  • 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...

    $59.99
  • Neptune Systems LD-3 Optical Multi-Surface Leak Sensor Neptune Systems LD-3 Optical Multi-Surface Leak Sensor Neptune Systems LD-3 Optical Multi-Surface Leak Sensor

    Neptune Systems

    Neptune Systems LD-3 Optical Multi-Surface Leak Sensor

    Neptune Systems LD-3 Optical Multi-Surface Leak Sensor Neptune's LD-3 Multi-Surface Optical Leak Sensor marks a significant improvement over its analog counterpart, the LD-2 Solid Surface Leak Detection Probe. While the LD-2 utilizes conductive strips...

    $59.99
  • 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...

    $59.99
  • 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...

    $59.99
  • Neptune Systems MOS Magnetic Optical Sensor Neptune Systems MOS Magnetic Optical Sensor Neptune Systems MOS Magnetic Optical Sensor

    Neptune Systems

    Neptune Systems MOS Magnetic Optical Sensor

    Neptune Systems MOS Magnetic Optical Sensor The Neptune MOS replaces the previous OS-1-M and features an updated design that fits into tighter spaces and helps to prevent water incursion into the sensor. The MOS plugs into an Apex FMM port and uses...

    $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
  • Practical Multi-purpose Utility Pump v2 - Neptune Systems

    Neptune Systems

    Practical Multi-purpose Utility Pump v2 - Neptune Systems

    Practical Multi-purpose Utility Pump v2 - Neptune Systems The PMUP is a 24VDC submersible pump that was designed to directly connect to the DC24 accessory ports on either the 1Link module OR the same ports on the new Energy Bar 832.  If you own our...

    $59.99
  • Neptune Systems 30' AquaBus Cable (Male / Male)

    Neptune Systems

    Neptune Systems 30' AquaBus Cable (Male / Male)

    Neptune Systems 30' AquaBus Cable (Male / Male) This is a thirty foot Male/Male Aquabus cable that connects one module to another or connects to an Aquabus extension cable.  This cable is intended to connect modules from one location to...

    $49.99
  • Neptune Systems Flow Sensor - 1/2" with adapters - FS50

    Neptune Systems

    Neptune Systems Flow Sensor - 1/2" with adapters - FS50

    Neptune Systems Flow Sensor - 1/2" with adapters - FS50 Usually used with aquarium accessories like reactors, carbon/GFO filters, etc., this flow sensor can be placed in line with the flow on any pipe, connected to the FMM, and communicate to your Apex...

    $49.99
  • Neptune Systems Replacement Head Cap for DOS Dosing Pump Neptune Systems Replacement Head Cap for DOS Dosing Pump Neptune Systems Replacement Head Cap for DOS Dosing Pump

    Neptune Systems

    Neptune Systems Replacement Head Cap for Dosing Pump

    Neptune Systems Replacement Head Cap for DOS Dosing Pump Direct replacement fluid metering head assembly for the Neptune DŌS Dosing Pump. The easy to install head replaces the tubing, roller, and plastic housing head cap. Compatible with DŌS and DŌS...

    $49.99
  • Neptune Systems SV1 Solenoid Valve Neptune Systems SV1 Solenoid Valve Neptune Systems SV1 Solenoid Valve Neptune Systems SV1 Solenoid Valve

    Neptune Systems

    Neptune Systems SV1 Solenoid Valve

    Neptune Systems SV1 Solenoid Valve Perfect for controlling your RODI system, top off system, calcium reactor, or other low flow items that use 1/4" tubing. The solenoid valves uses the 24V accessory port found on 1Link modules and the EnergyBar 832...

    $49.99
  • Neptune Trident Two-Month Reagent Kit Neptune Trident Two-Month Reagent Kit

    Neptune Systems

    Neptune Trident Two-Month Reagent Kit

    Neptune Trident Two-Month Reagent Kit Neptune System's Replacement Reagent Kit comes with everything you need to change out the reagents for the Trident Marine Water Analyzing System. Each kit comes with new bottles that can be placed directly into the...

    $49.99
  • Neptune Systems OS1 Optical Sensor - V2

    Neptune Systems

    Neptune Systems OS1 Optical Sensor - V2

    Neptune Systems OS1 Optical Sensor, V2 This sensor plugs into your FMM and, using reflected infrared light, will signal your Apex when it changes state from being wet to dry or dry to wet. This sensor can be used for constructing your own ATO...

    $39.99
60 of 88 Items