Neptune Systems FMK Flow Monitoring Kit

Overview

Take the guesswork out of your aquarium’s flow rates with the Neptune Systems Flow Monitoring Kit (FMK). By connecting to your Apex through the included Fluid Monitoring Module (FMM), the FMK lets you measure and track real-time flow through return pumps, reactors, refugiums, and more. Knowing your true flow rate not only improves system efficiency but also provides early warnings of pump issues, clogged lines, or other performance problems.

Key Features

• Know Your Flow – Accurately measure flow through return pumps, reactors, or other plumbed equipment.

• Complete Starter Kit – Includes FMM Module, flow sensors, and adapter fittings for multiple applications.

• Real-Time Alerts – Apex can notify you if flow stops or drops due to pump failure, clogging, or restrictions.

• Flexible Applications – Use on return pumps, carbon/GFO/biopellet reactors, refugium lines, or other inline devices.

• Expandable Design – FMM has four ports; add another flow sensor, water-level sensor, or leak detector.

• DC24 Accessory Port – Power Neptune accessories like the PMUP or Solenoid Valve (with optional power supply).

• Simple Plug & Play Setup – Just plug sensors into the FMM, add them in Apex Fusion, and start monitoring.

Benefits

• Protects your aquarium by detecting pump failures instantly.

• Helps maintain optimal flow rates for reactors and nutrient export.

• Reduces risk of undetected clogs, algae buildup, or channeling inside plumbing.

• Provides data-driven insights for pump performance vs. rated output.

• Expands Apex functionality with water-level sensing, leak detection, and DC24 accessories.

Product Specifications

• FMM Module Ports: 4 sensor inputs + 1 DC24 accessory port

• Flow Sensor Ratings:

  • 1/2" FS-50: 30–250 GPH

  • 1" FS-100: 150–1500 GPH

• Flow Sensor Type: Turbine or paddle-wheel mechanism (model dependent)

• Connection: Aquabus to Apex system

• Expandable Sensors: Available in 1/4", 1", and 2" sizes

What’s Included

• (1) FMM Module (Fluid Monitoring Module)

• (1) 1" FS-100 Flow Sensor

• (2) 1/2" FS-50 Flow Sensors

• (2) 1" Unions

• (4) 1/2" Adapters