The Neptune ATK can be used on its own, or in conjunction with any Apex Controller. Neptune's Auto Top Off Kit comes with everything you will need to have a functional and safe ATO system. The FMM module is the brain of the operation and has an indicating LED light along with an audible tone letting you know when anything goes wrong.
Dual Optical Sensors
Optical sensors are used by most of the top rated ATO systems, and the ATK uses two optical level sensors that control the overall function of the system. The sensors are pre-mounted into the magnetic bracket, with the lower optic being the primary water level sensor, and the higher optic acting as a backup sensor that will turn the ATK system off if necessary.
Adjustable Float Valve
Each ATK comes with a 100% reef safe adjustable float valve that acts as the last line of defense against overfilling. Float valves are very reliable and if water ever rises to activate the valve, the flow of water will be physically shut off saving you from a possible flood.
Don't think Neptune just stopped at sensors, and float valves to keep your floors dry and your tanks water level perfect. They included an algorithm that will monitor and learn how long it takes to fill your tank on average. After that is determined the system will never run for more than twice the time required to fill the tank. For example, if your tank typically takes 10 seconds to fill, the ATK will never run for more than 20 seconds, and if your system takes a minute to fill, it will never run for longer than 2 minutes.
PMUP Utility Pump
Each ATK includes the powerful PMUP that connects directly to the FMM module without the need for an additional power supply. The submersible PMUP fits is a variety of top off reservoirs and uses standard 1/4" OD Tubing (RO Tubing).
Got 90 Seconds? Watch how easy it is to set up!
Module Dimensions - 4.75" L x 2.75" W x 1.375" H
Mounting Bracket Dimensions - 6.5" L x 3" x 3.5" (loaded with sensors and float valve)
Pump Dimensions - 2.25" OD x 5.5" H
Max Tank Thickness - 1/2" (glass or acrylic)
Max Flow - 100GPH
Max Head Height - 14'
Tubing OD - 1/4"
Power Consumption - 17W
1x FMM Module
1x Power Supply
1x PMUP Pump
1x Pump to Tubing Adapter
1x Siphon Break Fitting
1x Magnetic Mounting Bracket
1x Adjustable Float Valve
2x Optical Sensing Eyes
1x 3' Aquabus Connection
13' Top Off Tubing
Worked like a charm By Casey on 10/3/2017Casey would recommend this product to a friendFollowed the instructions on the card to install, ran the task in Apex Fusion. That was it. It just works. Had if for about a month now.
Great ATO - wicked easy to set up By Jeff M. on 9/25/2017Jeff M. would recommend this product to a friendI got this because I have an Apex (with my own DIY ATO) already but I wanted an ATO for my QT that is located in my garage (no Apex there.....yet). Went together super simple. Haven't touched it for five weeks now. I really do not know what these other guys are doing . So simple. When I upgrade to the new Apex, my classic will go to the garage and connect up to this.
High expectations, disappointing performance By tlk2marty on 9/4/2017tlk2marty wouldn't recommend this product to a friendI have owned this product and implemented for just over a week, and very disappointed with the results. Building my system toward Apex automation this was a component I needed to upgrade. But I have found ATK to fail frequently. Despite following instructions, I had trouble getting the hose to hold in the pump coupling, and was advised by Neptune support possible it was pressed too far into the elbow on the unit in my sump. Still, this did not stop me from alert conditions every 24-36 hours which halted operation until I could reset. Now the product still fails on alert conditions and without the Apex controller I have no idea why nor any way to determine. It does beep, but that was not helpful.
In features the product seems well designed and modern. And I like the direction I was going for automation, but I need the standalone to work while I get there. It is expensive for the poor performance. First level support from Neptune was not helpful, but the escalation gave me good suggestions/feedback, though did not solve the reliability of the product. For $200 I have much higher expectations. I am dumping the solution and replacing with the Tunze Osmolator 3155 recommended by BRS and other hobbyists I've talk with about my troubles. I need consistency and reliability. Maybe when the kinks work out the ATK will be a better product, but it is not the product for me today.
Perfect By RBG on 8/9/2017RBG would recommend this product to a friendEasy instal, redundant safety features. Worked well right away and still does,
Mixed feelings on this piece of equipment By Randall on 8/8/2017Randall wouldn't recommend this product to a friendFirst, the good:
You can tweak the Apex programming to give you very granular auto topoff control. For my 100 circulating gallon system, a Defer time of 002:00 and a Min Time of 030:00 results in 10-20 seconds of auto topoff every 30-60 minutes, which keeps the salinity very stable.
The system comes with a siphon break valve, designed for systems with elevated RODI containers like the Red Sea Reefers. It works fine with pure RODI water (if a bit noisy), but I have no doubt it would clog quickly with kalkwasser-infused topoff water, as others have experienced; Neptune really should mention somewhere that this is not recommended.
The default Apex programming is pretty bad, at least by my standards. You may need to tweak it considerably to provide small incremental topoffs rather than large disruptive ones on your system.
If you don't have an Apex controller, best not to buy this system. The standalone features and limited configuration options are not attractive.
The 'high level' optical sensor is pretty close to the low level sensor. If you use the high level sensor for an alarm, be prepared for endless false alarms if you sometimes slightly overfill your sump, for example in preparation for acclimating new arrivals.
The really bad:
After 8 weeks, my low level optical sensor failed in the CLOSED state, and started leaking rust or something even more toxic. The contamination was bad enough, but the closed state meant that the ATK was going to think that everything was just fine as the water level went down down down and the return pump eventually stopped. Good thing I monitor my system obsessively. And that I had a spare optical sensor. From other people's experiences with this device as well as with the DOS DDR containers, it seems like these optical sensors are not really up to long term use in harsh chemical environments.
Best Ato By Inks on 8/1/2017Inks would recommend this product to a friendI've used tunze but I like this one better
Defective out the box. By Golden Pond on 7/28/2017Golden Pond wouldn't recommend this product to a friendI usually don't post negative reviews but this one really got to me. Where you plug the pump into the control box the pins are to small for the harness and after days of my water staying low. I finally figured out the problem. Had to zip tie the wire to the power cable to put enough side force to make the pump run. Box feels really cheap. $200 bucks for this. Buy the Tunze!
Nice product By Scott on 7/25/2017Scott would recommend this product to a friendEssentially a great product with multiple safety redundancies vs my previous Tunze. Well made and functions well. The alarm is very faint and must be powered down to reactivate. Love the anti-siphon function in the reservoir. I am not sure why the float valve is so gigantic. It is the largest part of the whole in sump apparatus plus taking up a lot of real estate. These are just minor things as I compare to my previous very small Tunze.
Bad optical sensor By Gene on 6/22/2017Gene wouldn't recommend this product to a friendAs always another defective item. The optical sensor always reads closed. So as usual with apex support they try to make it hard for you to get a replacement.
BE WARNED By Dani Zani on 6/18/2017Dani Zani wouldn't recommend this product to a friendI ran this in offline mode on my frag tank. Never again. Alarm tripped and ATO stopped over the weekend. In 40g frag tank this was a big deal!! Could have burned up my pump!!
Alarms should reset!!!
To fix I'm removing second sensor from water, and putting aside. But man, never had this problem with any other systems.
Easy to Install and QUIET By Mical on 6/17/2017Mical would recommend this product to a friendI've had a handful of different ATOs but this one by far is the easiest to install. Literally took minutes. Added bonus it's super quiet. Tested all functions in "stand alone mode" and it worked flawlessly. I like the redundancy and triggering of faults - yes you have to reset power but that's a minor nuance. The plus' outweigh the inconvenience by far.
Don't think an ATO could be made any easier By Jonny on 6/15/2017Jonny would recommend this product to a friendI have needed an ATO for a while - been procrastinating cuz there were just SO many choices. Saw the BRS video on this one so I thought Id give it a go. All I can say is that I wish all aquarium products were all this easy to set up. Litterally had it working in about five minites. I don't have an Apex - didn't think I needed one - but this ATK product has me looking closer now
Ask a question
With the float valve removed, the sensor block will fit in the back overflow area of your Nuvo tank. You could even add a third optical sensor if you wanted an extra backup.
The ATK is a completely stand-alone product with its own power supply, and if you want to connect it to your Apex jr., you'll just need an open Aquabus port and cable.
Have a great day!
I have the new Apex, is there a way to use the ATK without using another power adapter? Can I use the PMUP connected to my energy bar and how does that effect the ATO built in program?
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Have a great day!
Have a great day!
With my "German" ATO I have to direct flow to the display tank.
Otherwise once started by the pump, the reservoir would be completely drained by the siphon effect. Bad!
Have a great day!
Hope this helps!
Have a great day!
The head pressure will be less than 10 feet
Hope this helps!