Stop guessing your actual water turnover and take scientific control of your aquarium's circulation with the Neptune Systems FMK (Flow Monitoring Kit). While return pumps state a theoretical flow rate on the box, actual performance drops drastically due to plumbing elbows, head pressure, and media resistance.
The FMK unlocks live data tracking by measuring exact flow rates in gallons or liters per hour. It plugs directly into any Apex controller via AquaBus, giving you the real-time insights needed to fine-tune filtration and protect your livestock from sudden equipment failures.
📐 Technical Specs & Component Limits
Module Core: FMM (Fluid Monitoring Module) with 4 auto-sensing ports
1" Flow Sensor (FS-100): Rated for 150 to 1,500 GPH (Ideal for main return lines)
1/2" Flow Sensors (FS-50): Rated for 30 to 250 GPH (Ideal for reactors, UVs, and manifolds)
Auxiliary Power: Features a built-in 24VDC accessory port to drive small pumps or solenoids (Requires separate power supply)
System Compatibility: 100% compatible with all Apex models (Apex Pro, EL, Classic, Lite, Jr.)
🌟 Key Benefits
Early Warning Failure Detection: Monitor the exact flow rate of your main return pump. Set immediate smartphone alerts via Apex Fusion to notify you the second flow stops or drops, allowing you to catch failed or locked motors instantly.
Reactor Optimization & Fine-Tuning: Place the 1/2" sensors inline with Carbon, GFO, or biopellet reactors. Easily adjust your ball valves to dial in the perfect media tumble using live feedback on your Apex dashboard.
Visual Clog Diagnostics: As mechanical filters, UV sterilizers, or reactors accumulate detritus over time, their flow rate steadily drops. The FMK tracks this decline, visually showing you exactly when media needs to be cleaned or replaced.
Plug-and-Play Expansion Ports: The kit uses 3 of the FMM module's 4 inputs, leaving 1 port completely free. You can mix and match to expand your system by adding optional Neptune optical water-level sensors, 1/4" feed line sensors, or super-sensitive floor leak detection probes.
North American Plumbing Ready: The industrial-grade flow sensors utilize BSPT threading. To eliminate hardware store trips, the kit includes true PVC slip unions and adapters to glue directly into standard American 1" and 1/2" plumbing schedules.
📦 What's In The Box?
1x FMM (Fluid Monitoring Module)
1x 1" FS-100 Flow Sensor
2x 1/2" FS-50 Flow Sensors
2x 1" Slip PVC Unions
4x 1/2" Slip PVC Adapters
1x 3-Foot AquaBus Cable
Stop guessing your actual water turnover and take scientific control of your aquarium's circulation with the Neptune Systems FMK (Flow Monitoring Kit). While return pumps state a theoretical flow rate on the box, actual performance drops drastically due to plumbing elbows, head pressure, and media resistance.
The FMK unlocks live data tracking by measuring exact flow rates in gallons or liters per hour. It plugs directly into any Apex controller via AquaBus, giving you the real-time insights needed to fine-tune filtration and protect your livestock from sudden equipment failures.
📐 Technical Specs & Component Limits
Module Core: FMM (Fluid Monitoring Module) with 4 auto-sensing ports
1" Flow Sensor (FS-100): Rated for 150 to 1,500 GPH (Ideal for main return lines)
1/2" Flow Sensors (FS-50): Rated for 30 to 250 GPH (Ideal for reactors, UVs, and manifolds)
Auxiliary Power: Features a built-in 24VDC accessory port to drive small pumps or solenoids (Requires separate power supply)
System Compatibility: 100% compatible with all Apex models (Apex Pro, EL, Classic, Lite, Jr.)
🌟 Key Benefits
Early Warning Failure Detection: Monitor the exact flow rate of your main return pump. Set immediate smartphone alerts via Apex Fusion to notify you the second flow stops or drops, allowing you to catch failed or locked motors instantly.
Reactor Optimization & Fine-Tuning: Place the 1/2" sensors inline with Carbon, GFO, or biopellet reactors. Easily adjust your ball valves to dial in the perfect media tumble using live feedback on your Apex dashboard.
Visual Clog Diagnostics: As mechanical filters, UV sterilizers, or reactors accumulate detritus over time, their flow rate steadily drops. The FMK tracks this decline, visually showing you exactly when media needs to be cleaned or replaced.
Plug-and-Play Expansion Ports: The kit uses 3 of the FMM module's 4 inputs, leaving 1 port completely free. You can mix and match to expand your system by adding optional Neptune optical water-level sensors, 1/4" feed line sensors, or super-sensitive floor leak detection probes.
North American Plumbing Ready: The industrial-grade flow sensors utilize BSPT threading. To eliminate hardware store trips, the kit includes true PVC slip unions and adapters to glue directly into standard American 1" and 1/2" plumbing schedules.
📦 What's In The Box?
1x FMM (Fluid Monitoring Module)
1x 1" FS-100 Flow Sensor
2x 1/2" FS-50 Flow Sensors
2x 1" Slip PVC Unions
4x 1/2" Slip PVC Adapters
1x 3-Foot AquaBus Cable
