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  Contains 3x 2-month reagent kits  (based on the default testing schedule of 4-Alk/2-Ca/2-Mg per day).  The 2month reagent kit has at...

2-month reagent kit (based on the default testing schedule of 4-Alk/2-Ca/2-Mg per day).  The reagent kit has at least 240 alkalinity tests an...

Neptune Conductivity Calibration Solution - 53.0 mS

The Neptune Apex Trident - Marine Aquarium Water Analyzer is HERE!   The Trident is a self contained automatic titration colorimeter. That’s quite ...

A multi-purpose dosing and fluid delivery system of uncompromising quality combined with the simplicity of Apex Fusion software wizards for operati...

If these are out of stock that means they are still back-order from Neptune direct, we have the calibration fluid as single kits. Here are th...

Neptune Systems Temperature Probe For Apex Controllers

Optical Sensors with Magnetic Mounts Whether for your ATO reservoir, to use as a sump-high alert, or for your long term water storage such a...

The MPR - Magnetic Probe Rack was designed specifically for the Apex and will hold their larger diameter temperature probe, pH probe, ORP probe, an...

  Stay-dry system prevents caking and clumping   A common issue for most aquarium autofeeders is moisture getting into the food, ma...

This 24VDC powered, normally-closed (NC), solenoid valve has push-fit tubing input and outputs designed for standard 1/4″ tubing. The electric...

What's the difference between double junction and single junction probes? Single junction probes put the reference electrode in direct co...

  The ATK (Automatic Top-off Kit) is a simple, standalone, and complete solution for replacing water lost to evaporation.   The new aquarium hobbyi...

Neptune Apex Optical Level Sensor (OS-1)

The DŌS comes standard with 4m of tubing. Many customers have been asking to purchase more tubing. We now have an available accessory — a 16-...

  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 s...

INTELLIGENT, QUIET, ENERGY EFFICIENT   Your return pump is by far the most important piece of equipment on your aquarium. It circulates the water w...

THE ULTIMATE MULTIPURPOSE FLUID-MONITORING DEVICE!   The FMM (Fluid Monitoring Module) is a multi-purpose device that, with the help of ...

Neptune Systems IO Breakout Box The IO Breakout Box allows the easy addition of water level float switches, water pressure and f...

  A POWERHEAD THAT ANSWERS ALL YOUR NEEDS   Extreme flow (~4000+ gph) Compact size (less total mass compared to nearly all...

Energy Bar 832: This Energy Bar 832 was redesigned from the ground up. Not only does it have eight 120V AC outlets, but it includes an internal ...

DŌS Replacement Pump Head Cap for your Neptune Systems DŌS module. Complete assembly includes cover, peri-tube, fittings and roller wheel. Nep...

4-pin male to male cable many of you have been waiting for. It is ten feet long. This cable allows you to connect your DŌS to the 1LINK there by el...

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...