Protect your aquarium and home from costly water damage with the Neptune Systems Leak Detection Kit (LDK). Designed for seamless integration with your Apex Controller, the LDK includes everything you need to start monitoring for leaks within minutes. With two included leak detection probes and an FMM module, you’ll have peace of mind knowing your system can detect and respond to leaks before they become disasters.
Complete Starter Kit – Includes FMM module, two leak detection probes, and an Aquabus cable.
Apex Integration – Connects directly to any Apex model through Aquabus.
Expandable System – Supports up to four leak detection sensors total.
Early Leak Detection – Identifies leaks or overflows before they cause damage.
Custom Alerts & Actions – Use Apex Fusion to set alarms and control equipment in response to leaks.
Multiple Placement Options – Sensors can be positioned anywhere leaks are most likely to occur.
Under the aquarium stand
Beneath carpeting or flooring
Next to ATO reservoirs
Under RODI systems
Near external pumps or equipment
Above protein skimmer lids (overflow protection)
Module Type: FMM (Fluid Monitoring Module)
Sensor Type: LD-2 solid surface leak detection probes
Connectivity: Aquabus cable to Apex
Compatibility: All Apex models (latest AOS required)
Expandable: Supports up to 4 total leak detection probes
(1) FMM Module
(2) LD-2 Solid Surface Leak Detection Probes
(1) 3 ft. Aquabus Cable