Neptune Automatic Top-Off Kit (V2)

Neptune Automatic Top-Off Kit (V2)

Neptune Automatic Top-Off Kit (V2) is a complete, standalone auto top-off system that automatically replaces the water your aquarium loses to evaporation. It suits hobbyists who want a simple, plug-and-play ATO with several layers of overfill protection. It also suits Apex owners who want extra monitoring and integration.

Topping up freshwater every day is one of the most tedious tasks in the hobby, which is why an ATO is often the first piece of automation a new aquarist buys. It is also useful when you are away on holiday with nobody to watch the tank, or when you simply want a few days without thinking about water levels.

Key Benefits

• Complete, simple and standalone: everything needed for plug-and-play operation is in the kit, and no Apex controller is necessary.
• Powerful 24V DC PMUP v2 pump moves water from your reservoir to the aquarium or sump.
• Two optical sensors with no moving parts monitor the water level.
• IQ-Fill water run-time intelligence keeps an eye on how long the pump runs.
• A mechanical float valve acts as a physical last line of defence.
• Audible alarms sound if a safety measure is triggered.
• Works with or without an Apex controller. Advanced features are unlocked when it is paired with Apex controllers.

Three Levels of Safety Backup

• Backup optical sensor: if the primary water level sensor fails, the backup optical sensor stops the ATO pump and an alarm sounds.
• IQ-Fill (stand-alone mode only): the system will not add more than double the learned water amount. If it runs for too long, it stops the ATO pump and an alarm sounds.
• Physical float valve: in the rare event that the electronic failsafes do not work, a mechanical float valve stops water flowing into your aquarium.

PMUP v2 ATO Pump

The PMUP is a small utility pump that is well suited to moving water from your RODI reservoir to the aquarium or sump. Its vertical design drops easily into most water jugs or ATO reservoirs. It can pump water over 14 feet vertically, so it can deliver water from remote or lower-floor reservoirs. The bottom of the pump has a removable screen that keeps debris out of the pump while giving easy access to the impeller for cleaning.

How to Use

• Standalone: plug in the components and the kit is ready to run without an Apex controller. IQ-Fill protection applies in this mode.
• With an Apex: plug in all the components, connect the kit to your Apex with the AquaBus cable, then run the set-up task in Apex Fusion.
• Place the PMUP v2 pump in a water jug or ATO reservoir holding your RODI water.
• If you are not using the float valve, a set screw is supplied for non-float valve applications.

Extra Value for Apex Owners

• Receive email and push notifications if something goes wrong.
• Integrate the kit into other Apex functions.
• The included FMM module has four ports for sensors and probes. The two optical sensors only use port-1 and port-2, leaving two free ports for accessories such as leak detectors, flow sensors and additional optical sensors.

Suitable For

• Aquariums and sumps that need evaporated water replaced automatically from a RODI reservoir.
• New hobbyists looking for a first ATO.
• Aquarists who go away and want reliable top-off with backup safety measures.
• Existing Apex users who want a notification-capable ATO.

Compatibility

• Works as a standalone system or connected to an Apex controller via the AquaBus cable.
• The PMUP v2 pump fits into most water jugs and ATO reservoirs.

Specifications

• Pump: PMUP v2, 24V DC
• Vertical pumping height: over 4.27 m (14 ft)
• Power supply: 24V, 36W
• Sensors: two optical water level sensors with no moving parts
• Fluid Monitoring Module: four ports for sensors and probes
• Tubing: 4 m (13 ft) orange RO tubing
• Fittings: 3/8" to 1/4" push connect adapter, 1/4" push connect siphon break, 90° tube fitting

What's Included

• FMM Fluid Monitoring Module
• 2 x Optical Water Level Sensors
• Float Valve
• 90° Tube Fitting
• PMUP v2 ATO Pump
• 4 m (13 ft) Orange RO Tubing
• 3/8" to 1/4" Push Connect Adapter Fitting
• 1/4" Push Connect Siphon Break
• Set Screw for Non-Float Valve Applications
• 24V 36W Power Supply

Frequently Asked Questions

Do I need an Apex controller to use this kit?
No. It is a standalone, plug-and-play ATO. Pairing it with an Apex controller unlocks advanced features.

What happens if the main water level sensor fails?
The backup optical sensor stops the ATO pump and an alarm sounds. If the electronic failsafes do not work, the mechanical float valve stops water flowing into the aquarium.

What does IQ-Fill do?
In stand-alone mode, IQ-Fill learns the water amount normally added. It will not add more than double that amount. If the system runs for too long, it stops the pump and sounds an alarm.

How high can the pump lift water?
The PMUP v2 can pump water over 14 feet vertically, so it can supply an aquarium or sump from a remote or lower-floor reservoir.

How do I clean the pump?
The bottom of the pump has a removable screen. It keeps debris out and gives you easy access to the impeller.

Can I add other sensors if I connect it to an Apex?
Yes. The FMM module has four ports and the two optical sensors use only port-1 and port-2. The two free ports can take accessories such as leak detectors, flow sensors and additional optical sensors.