XP Aqua

XP Aqua Sumpless ATO - Complete Aquarium Auto-Top-Off System for Sumpless Aquariums


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Read "The Sumpless ATO from XP Aqua is the First Auto Top-Off Built for Tanks Without Sumps" on the Marine Depot Blog, written by its creator, Joseph Chang.

XP Aqua Sumpless ATO - Complete Aquarium Auto-Top-Off System for Sumpless Aquariums

Why Choose Sumpless ATO?

Sumpless ATO is the first and only ATO designed specifically for aquariums without sumps. The combination of the sleek overflow box and the innovative dual-optical sensor ATO will help to keep your aquarium topped off and your water crystal clear. The overflow box easily mounts to any aquarium with its magnetic mount. It acts as a surface skimmer to rid your aquarium of undesirable oily surface skim and doubles as a media reactor for carbon, GFO or any media of your choice. XPAqua’s proprietary dual-optical sensor packs two precise level sensors in one incredibly small package. In addition to keeping your water level constant, the two sensors also work in concert with the intelligent QST programming to help prevent overfilling. With so many features never seen before in ATO’s, the XPAqua Sumpless ATO is the ultimate ATO solution for aquariums without sumps.


  • Engineered Specifically for Aquariums without Sumps
  • Dual-Optical Sensor for Precise Operation with Secondary Failsafe
  • Intelligent Pre-Programmed Algorithm
  • Doubles as an Effective Surface Skimmer
  • Convenient Media Chamber for Filtration Media
  • Plug-and-Play with All Parts Included
  • Works in Complete Darkness  

Technical Details:

  • Model: SATO-200P
  • Power Input: 100-240VAC 50-60HZ
  • DC Pump
    • Head: 6.5ft (200 cm)
    • Flow rate: 74 gph (280lph)
  • Max Mounting Thickness: 1/2" (12.7 mm)
  • Flexi Surface Skimmer Dimensions: 4" wide, 2.2" deep, and 6.3" tall

Product Manuals & Documentation

XP Aqua Sumpless ATO - Complete Aquarium Auto-Top-Off System for Sumpless Aquariums

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

The "XP" in XP Aqua stands for Aquarium Experts. The company founders are passionate hobbyists focused on innovating, engineering, and manufacturing the absolute best, safest, and most easy-to-use auto top-off (ATO) systems on the market. The company was founded in 2017 and first introduced their products to the world at Interzoo 2018.

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9 Questions
Displaying questions 1-9
What are the dimensions of the overflow box?
Asked : Jul 01, 2018
By : jack, dallas, oregon
This includes the pump?
Asked : Jun 30, 2018
By : Ash, CA
Absolutely. The package includes the pump that is in the overflow box as well as the pump for your reservoir to pump water from the reservoir in to your aquarium.
Answered : Jul 07, 2018
By : XP Aqua, DFW, TX

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