Prism ATO Bundle

(7 customer reviews)


The Reef Breeders Prism-ATO is super compact and has 3 sensors. The bundle includes and N30 ATO for additional redundancy.

4 in stock (can be backordered)

Warranty Period



The Reef Breeders Prism-ATO  is designed to work with aquariums of all sizes, from pico desktops and All-in-One aquariums with limited space, to large reef tanks with full sumps. The Prism ATO has 3 sensors and registers your water level in a fraction of a second. It’s small platform allows it to be installed unobtrusively almost anywhere!

What’s in the Bundle?

The Prism ATO Bundle includes an N30 ATO manual backup float. The N30 is a physical backup float, which is positioned about 1″ above the high level sensor. If there is a siphon or the water level is too high for any reason, the water flow will be manually shut off, without relying on electronics.

  • 1 x Prism ATO
  • 1 x N30 ATO

Fully Self-Contained.

The Reef Breeders Prism-ATO is fully self-contained, meaning the controller and sensors are all contained in one small central unit. There is one plug for power in, and another plug for power out to the pump (included). That’s it. No more controllers to mount in your aquarium stand.

Three Water Level Sensors Onboard.

Every Prism ATO includes 3 sensors to determine your aquariums water level.

  • Low Level: If water drops below this point, the pump will be activated until water hits the next sensor.
  • Fill Level: 1″ above the low level sensor, this sensor turns the fill pump off when it detects water.
  • High Level: 1″ above the fill level, and 2″ above the low level sensor, this sensor deactivates the pump when it senses water.

All Inclusive.

The Reef Breeders Prism-ATO includes everything you need to get started- Just add water! The Prism-Ato system includes the sensor and magnet mount, a small dc power supply, a pump, tubing, and a tubing holder that fits most aquarium rims. The magnet mount works with glass up to 1/2″ thick, and does not require a clear pane of glass to function.

Every Reef Breeders Prism-ATO includes a full 12 month USA warranty.

Ships from Wakefield, RI USA

Additional information

Weight 1.35 lbs
Dimensions 7 × 6 × 5.5 in
Included Accessories

60" Tubing, Manual, Manual Backup Float, Power Supply, Pump, Tubing Holder

Product Dimensions

3" x 1" x 1.25" In Tank, 1" Diameter x 1.25" Magnet Outside Tank, 5" x 2" x 6" LWH

Maximum Glass Thickness


Ideal Tank Size/Type

In Sump, In Tank, Pico/Nano and All-in-One (AIO) Tanks over 2 gallons

Safety Features

3 Sensors Total, High Water Level Sensor, IR Visual Level Sensor, Manual Backup Float

Maximum Head Height

8 Feet

7 reviews for Prism ATO Bundle

  1. Mark (verified owner)

    Simple setup, just working in minutes. Hard to believe that tiny pump pushes out that much water.

  2. Matthew C. (verified owner)

    Setting this up on my system couldn’t have been any easier!

  3. Kevin (verified owner)

  4. James G. (verified owner)

    Will be doing business with again.

  5. Gary L. (verified owner)

    One item was missing in the bundle but I emailed and it arrived in 2 days. Good service.

  6. Kwame Mitchell (verified owner)

    This one of most by far the easiest setup have done for the ato and I also like the small sleek look of it. I would definitely buy another one and also recommend it to other reefers.Thank you reef breeders!

  7. Johan T. (verified owner)

    Very professional and efficient company. Was missing an item and emailed them, answered back super fast, after 1 day past, I have the missing item. I tried to sum up their customer service In a few words, lol. There is so much good about this company. Thank you, reef breeder

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