ReefBreeders ATO

The ReefBreeders ATO is designed to be reliable, easy to set up, and clean-looking in just about any reef system. It includes everything you need to automatically maintain your aquarium’s water level, including a sensor, pump, black tubing, tubing mount, siphon break, and waterproof magnetic mount.

For 2025, the ReefBreeders ATO has been updated with a new, more robust power supply, a longer pump cable for easier placement, and a new pump with a slightly larger motor to further improve lifespan and reliability.

Key Features

• All-in-One Kit: Includes pump, tubing, tubing holder, magnet-mounted sensor, power supply, and siphon break so you can get up and running quickly.
• Compact IR Sensor: The advanced infrared sensor is only 0.86" long, making it less obtrusive in your tank while reducing the amount of water added during each top-off cycle.
• Clean, Uniform Look: All major components are finished in deep black to blend in with most sumps and display aquariums.
• Strong Magnetic Mount: Compatible with both glass and acrylic, and securely attaches to panels up to 5/8" thick.
• Quiet, Upgraded Pump: Runs more quietly than the earlier Prism ATO pump for a less obtrusive experience.
• Improved Sealing: Refined seals on the sensor and magnet housing offer better protection and longer service life than the previous Prism ATO design.
• Dry Run Protection: An integrated level sensor on the pump side detects when the reservoir is empty and automatically shuts the pump off to help prevent damage.
• Secure Tubing Holder: Designed to fit tank trims or euro braces up to 0.6" thick, keeping the outlet securely in place.
• Premium Black Tubing: Includes 6.5 feet of 1/4" ID black vinyl tubing for a neat, professional appearance.
• Waterproof Connections: IP65-rated plugs for both the power supply and pump add an extra layer of safety and durability.
• Integrated Siphon Break: Helps prevent unwanted siphoning by allowing air into the line when the pump is off. Because it can also allow a small amount of water to exit, it should always be positioned inside the rim of your aquarium, sump, or ATO reservoir.
• Practical Cord Lengths: The pump and power supply each have 56" leads to the Y-cable, plus a 20" lead from the Y-cable to the ATO sensor, for a total reach of about 6.5 feet.