10 Gallon ATO Containers (26-34 Series)


BUILT TO ORDER ITEM- Current lead time is 6 weeks

15″ x 12″ x  15″  10 Gallon ATO

    Reset options

    Storm Cloud comes with all white sides and back by default. Choose "All Clear" for storm Cloud. All other colors will have Clear Sides and back if "All Clear" is chosen. For solid colored sides and backs on these, please choose "Color to Match"

    *Color To Match

SKU: 10GallonATO Category:


The Synergy Reef Series ATO Containers fit in line perfect with our 26 and 34 series sumps. We have designed this model to be plug and play with these sumps. They can also be used with any existing reef tank setup. The Synergy Reef ATO is built of the highest quality domestic cast materials available. Our attention to detail is second to none. These are universal and will work with any ATO controller on the market.


  • Standard – Clear Sides and Back ***** If you would like the sides and back the to be matching Color , please select “Color To Match” in the Exterior Wall Color Option above. For Storm Cloud choose “ALL CLEAR”.  Storm Cloud will have White sides/back with a Clear Smoke front. 
  • 15″ x 12″ x 15″ Outside Dimensions
  • Approx. 10 Gallon Storage Capacity
  • 1/4″ John Guest tubing holders for plug n play ATO connection
  • 1.5″ Rear hole allows for power cord to be run outside the container if an internal pump is used.
  • Will work with all ATO control units
  • 3″ Fill hole for easy filling
  • Laser Etched graduated gallon markings on the front panel for easy measuring of water level
  • Built in the USA!

Additional information

Weight16 lbs
Dimensions21 × 21 × 17 in

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Exterior Wall Color


Customer Reviews

Based on 4 reviews
Art Samuel
Exactly as described — only better

I had expectations for a solid unit. Instead, I received a well built, thoughtfully planned outstanding product. What a pleasant surprise to have the ordinary become the extraordinary. Highly recommended.

Well made ATO reservoir.

I like these reservoirs. They have a small cut out for cords, 1/4” John Guest fitting, and the top is easy to grab.

William S.
Highly Impressed!

I thought picking out what I wanted was going to be hard. Nope! Ordering was simple and then it was followed up with constant communication for every step of my build. Hats off to Synergy Reef. I thought unboxing the ATO tank was awesome. But when I slid the tank into the exact space I measured it for, it was even better. You guys kick ass and build amazing products. Keep up the good work!

-New life long customer

P.S. Love the sticker!

Thank you for taking the time to leave us this review! We are happy to hear your experience was above an beyond what you expected! We not only want you to be happy with our products, we want you to be happy with the whole experience! Your purchase and review is what helps us make Synergy Reef what it is today and we will continue to make it better!

Jordan Stone

So worth the wait! This is my second ATO reservoir from Synergy Reef, and I wouldn't buy from anyone else. The craftsmanship and work that went into making this is pretty evident. Don't hesitate for one second in purchasing.