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Description
Neptune Systems Apex- Flow Monitoring Kit – FMKFlow Monitoring Kit FMK Kit Includes FMM (Fluid Monitoring Module) The FMM (Fluid Monitoring Module) is a module that connects to any Apex (Apex(2016), Apex Classic, Apex Lite, Apex Jr.) via its AquaBus port providing four multi function monitoring ports that can be used for flow sensors, water level sensors, leak detections sensors and possibly future products as well. 1 Flow Sensor (FS 100) This flow sensor connects to the FMM, monitors the flow of
Flow Monitoring Kit – FMKKit Includes
– FMM (Fluid Monitoring Module)
The FMM (Fluid Monitoring Module) is a module that connects to any Apex (Apex(2016), Apex Classic, Apex Lite, Apex Jr.) via it’s AquaBus port providing four multi-function monitoring ports that can be used for flow sensors, water-level sensors, leak detections sensors and possibly future products as well.
– 1″ Flow Sensor (FS-100)
This flow sensor connects to the FMM, monitors the flow of water through the device, and then reports it back to your Apex via the FMM. This sensor is most often used to measure the flow in the main return line of a standard-sized aquarium. The FS-100 will work with flow rates from 150-1500 gph.
– Two 1/2″ Flow Sensors (FS-50)
This flow sensor connects to the FMM, monitors the flow of water through the device, and then reports it back to your Apex via the FMM. Two of these are included in the FMK. These sensors are perfect for attaching to devices such as media reactors, biopellet reactors, etc. The FS-50 will work with flow rates from 30-250 gph.
– Two 1″ Unions
To connect your FS-100 Flow sensor, Neptune Systems has included in the FMK, two 1″ BSPT -> 1″ Slip PVC Unions.
– Two 1/2″ Adapters
To connect your two FS-50 Flow sensors, Neptune Systems has included in the FMK, two 1/2″ BSPT -> 1/2″ Slip PVC Adapters.
Measuring the flow of your aquarium’s main return pump is an incredibly useful piece of information. The key benefit would be to have the Apex notify you the instant the flow stops for any reason — usually the result of a failed or faulty pump. Furthermore, an indication of a reduced flow rate could be used to determine that the pump or the lines are dirty or are becoming clogged with algae, debris, animals, or the growth of organisms inside your plumbing.
Auxiliary pumps on reactors and the like are very handy applications for the FMM. Place a flow sensor on a device like a carbon/gfo reactor and it serves many purposes. First off, you will know if your pump is not on or is faulty. Next, you can easily fine-tune the flow into the reactor by watching the dashboard tile on your Apex. Finally, you can know when the reactor is becoming clogged with detritus or possibly channeling has occurred by an alert on your Apex or by monitoring your dashboard.
Put a flow sensor inline to your device, plug it in to the FMM, and see exactly the flow rate of the water (any aquarium fluid really) going through that sensor. The industrial-grade flow sensors use either a turbine or paddle-wheel mechanism (depending on the model) to measure the flow.
With the FMK – Fluid Monitoring Kit you get one 1″ Flow Sensor and unions as well as two 1/2″ Flow Sensors with adapter fittings.
The FMK comes with three flow sensors but the FMM Module has a total of four ports. This means you have one port free to use for another purpose. Buy an additional flow sensor (sold separately, available also in 2″ and 1/4″ sizes), optical sensor or leak detection sensor and add even more functionality!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
My cats LOVE it!!!!
Size: 50 Pcs
My cats (3) are 7,5, and 3. They don't play with ANYTHING. They would cats mice for 5-6 minutes and quit. Teaser wands?
Puh-leeze! They act so above it all, it's been hard to play with them. By some miracle, I came across this toy and thought its not so expensive if they don't like it I won't go thru the trouble of returning it. But they love it. They each have a favorite corner where they jump all over themselves trying to catch it. They play for 15-20 minutes at a time which is AMAZING! My only regret is I bough the one with 30 pieces instead of 100! I am definitely a huge fan and will be buying another on as soon as this review is finished. You can manipulate how and where you shoot the poms, the cats can't get hurt because the trigger doesn't have that much pressure but you can shoot across the room no problem. I wish I had found this a year ago. It is a definite 5 stars, two thumbs up (or three paws up) in my house!
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Reviewed in the United States on November 2, 2023
★★★★★ 5
Great toy
Color: Red
Indestructible by my Boxers
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Reviewed in the United States on March 21, 2026
★★★★★ 5
Broke the first day
I purchased the owl ball because of other dog chew toys I purchased from Amazon. Those other chew toys are still holding together. The main reason I got the owl ball is due to the different noises it makes other than the regular squeak noise. After giving the toy to my dog he loved it right away. He especially liked the noise it made. After a few hours, I noticed he was chewing a white tube-like device. I took this away from him and determined it was the noise maker in the owl ball. I examined the owl ball and noticed the glue used to keep the ball cap shut did not hold. On closer inspection, I noticed what looked like rubber cement was used to hold the cap on but if it was rubber cement it was used improperly. Anyway, I just reglued the cap correctly and now it's just a ball because my dog destroyed the noise maker.
OK, Since I posted this review I was contacted by the seller. They offered to give me a full refund for the owl ball. I accepted the offer. So, I will try it again, but buy a different color owl this time. I never expected a refund since it's just a ball now, my dog still plays with it and it is holding up very well. The material it is made from is pretty sturdy.
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Reviewed in the United States on September 4, 2024
★★★★★ 3
Squeaker not working!
Color: Yellow
I'll give it 3 stars because I love the design and it's sturdy and great for dogs to hold/launch. That said, the squeaker doesn't really work... I tried everything but it just doesn't make any sound. My dog wasn't really interested but when it did make a slight sound he approached it. Once it stopped he lost interest. But he's very difficult to please😆 so if you have a normal dog, he'll probably like it!
I hope the manufacturer fixes the squeaker issue because apparently many people are having the same issue, which is a shame because the product is clearly well made!
I'm on the fence about returning it just because the quality it's amazing(squeaker issue aside)!
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Reviewed in the United States on September 19, 2025
★★★★★ 4
Sturdy rubber ball. Noise maker could be improved
Color: Red
I would have given it five stars because of how much, my dog loved it in the beginning.
And shut us up holds true as a sturdy rubber ball. My only complaint is at with one of my dogs being a heavy chewer, she was able to bust the noise making part. The ball never broke open or anything. It just no longer makes noise. You can hear the piece rattling on the inside. The ball itself is still solid tho
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Reviewed in the United States on March 6, 2026
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