10 Gallon ATO Containers (44-60-72 Series)


18″ x 8″ x  18″  10 Gallon ATO for our TS-44 and CL-44 Series Sumps.

BUILT TO ORDER ITEM – Current lead time is 1-2 weeks, 3 weeks on Grey color schemes.

    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: 10GallonATO18 Category:


The Synergy Reef Series ATO Containers fit in line perfect with our TS-44, CL-44, TS-60 & CL60 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. 
  • Dimensions: 18″ long x 8″ wide x 18″ high
  • 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
  • 4.5″ Fill hole for easy filling
  • Laser Etched graduated gallon markings on the front panel for easy measuring of water level
  • Built in the USA!

MSRP: $229.99-$239.99



Additional information

Weight17 lbs
Dimensions23 × 23 × 13 in
Exterior Wall Color


Customer Reviews

Based on 11 reviews
Quentin Smith
Large and in charge

Originally purchased the 5 gallon reservoir from Synergy REEF and it was great, but only got me to mid week until I had to fill it again. This 10 gallon reservoir can keep my 168 gallon open top peninsula topped off all week.

Nicholas O'Shaughnessy
Absolutely beautiful sump. But shipping was misleading.

Sump arrived no leaks after testing. It’s plumbed in and looks absolutely fantastic. I went with gray and red and used sch80 plumbing to match. Turned out very nice.

I do have one concern that i wanted to ask. There are a few of the baffles that have adjustable sections that are secured with hand screws. I want to know what metal these screws are made out of because they are magnetic and I’ve never heard of exposed metal being safe for fish and coral (unless titanium) especially if magnetic. Please advise on this.

The reason for the 4 star is because i received all sorts of emails about shipping and how i should inspect it and not sign for it until inspected fully. Well the carrier arrived at random without warning. Luckily i was home but i literally had no clue it was arriving. I wanted it shipped to a different location and i was told in the email they would contact me before and i would give all the necessary info/plan where to meet driver if necessary depending on the size of the truck. The truck was a full size semi and i live in a small condo so i wanted to meet the driver in a Walmart parking lot by my work. it all ended up working out by sheer luck. Also the driver basically said he didn’t have time to let me inspect it so there was no way i could verify damages for the sump because it was wrapped in clear plastic and cardboard and impossible to decipher if damaged.

Luckily it all worked out and like i said the sump is an absolute piece of art.

Baller Status

Love it great foot print, much better than square. Only thing would change is the fill level indicators should match color highlights
Fast buld time keep it up

Excellent product

Always excellent products.

Tom Millen
CL-72 w/ATO

If you are in the market for a custom sump, I highly recommend them. They are very professional and are very responsive with any questions that you have during the build process. Also, when you receive your sump, you will be impressed on the packaging care they take.. Tom