15 Gallon ATO Containers (SK-44-72 CL-44-72 TS44-72 Series)


18″ x 12″ x  18″  15 Gallon ATO

BUILT TO ORDER ITEM – Current lead time is 3-4 weeks

    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"

  • Exterior Wall Color*
SKU: 15GallonATO18-1 Category:


The Synergy Reef Series ATO Containers fit in line perfect with our TS-44 to TS72, CL-44 to CL72, & SK44-SK72 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 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 12″ wide x 18″ high
  • Approx 15 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: $289.99



Additional information

Weight22 lbs
Dimensions23 × 23 × 17 in
Exterior Wall Color




Customer Reviews

Based on 2 reviews
Yannick Rhéaume-Lafleur
Very nice

Very beautiful like I want. Not test again with water because my setup is not ready but i'm happy about the finish 👌 only the bad thing is about pay 80$ for shiping in Canada and once to my house they make me pay 87$ more for border taxe...

Donnie Rose
Amazingly amazing 15g storm cloud ATO

Looked great online but even better in person. What. Sick a** ATO with great dimension. It obviously does what it’s meant for but esthetics are extremely important as well. Love the logo and the storm cloud tint is awesome while still being able to view water level. Thank you Synergy Reef