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Home » Saltwater Aquarium Supplies  » Dosing Pumps & Top-Off  » Electric Powered  » Plug-In Units  »  SpectraPure® U.P.L.C. Ultra-Precise Level Controller II
SpectraPure® U.P.L.C. Ultra-Precise Level Controller II

SpectraPure® U.P.L.C. Ultra-Precise Level Controller II

Average Rating 3.5 6
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SpectraPure® U.P.L.C. Ultra-Precise Level Controller II Information

Product Manuals & Documentation

SpectraPure® Ultra-Precise ATO holds your tank's salinity constant while adding replacement water or Kalc in small doses. The pump can operate in either "fill mode" or "drain mode" when the water level changes. The Sensor Tube can be pre-set to operate with a minimal (0.1") change in water level up to a 4" difference. This calibration is saved even after a loss of power.

The ATO runs on a ten-second cycle. The pump can be on for any number of seconds each cycle, including zero (always off) and ten (always on). After the Ultra-Precise ATO is powered up, use the UP and DOWN buttons to adjust the ON-time in 10% steps. (This value is also saved even after a loss of power).

The pump used in the Ultra-Precise ATO is the same pump that is in the LiterMeter III™ , the leader in aquatic dosing for over 10 years. Now with our new improved, long life Peristaltic tubing. This is the quietist, most reliable Peristaltic Pump ever made.

Quality that you can see, performance you won't believe.
  • Fully automatic operation - Can be programmed for "fill mode”or “drain mode"
  • New and Improved Pump. Highest quality and accuracy
  • High reliability metal LiterMeter III pump
  • Virtually maintenance free
  • No check valves to clog or seals to leak
  • Self-priming and anti-siphoning
  • Hi-limit float switch for fail-safe operation
  • High delivery pressure - over 40 psi
  • Compact size and cool operation
  • Kalkwasser and Chemical safe
  • No damage to the pump if run dry
  • Quiet operation and low power consumption
  • Complete system consumes less than 4 Watts when pump is on
  • Pump Flow Rate: Adjustable in 10% Steps up to 200 mL/min
  • Extended 5-year Warranty

Manufacturer Info

SpectraPure Aquarium Supplies
SpectraPure was established in 1985 and is located in Tempe, Arizona, home of Arizona State University. SpectraPure is dedicated to excellence in the design and manufacture of water filtration and purification systems for household, commercial, laboratory and light industrial applications. Their product lines includes a full range of systems and equipment, including drinking water systems, water softeners, filtration systems, reverse osmosis units, RO/DI and deionization systems and many other technological innovations and water purification accessories. SpectraPure provides innovative, state-of-the-art solutions to water purity problems and applications.

SpectraPure® U.P.L.C. Ultra-Precise Level Controller II Reviews

Average Rating
(6 reviews)
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Good pump - crappy suction cup

Reviewers Rating Below Average

Posted: 8/1/2016 from BOUNTIFUL, UT UNITED STATES
2.0 5
Experience Level: Expert

Comments: Great pump and accurate sensor... why would you strap it to a suction cup that is going to fail!! I did as instructed and added a dab of silicone sealant to the suction cups when installing the sensor to the side of my sump. After 2 months it started to fall off so I reapplied the sealant and re-suctioned the cups to have them fall off again 3 months later! Horrible design! No wonder this product is discontinued! I modified the attachment by supergluing the sensor to a magnet (much like other competitors systems). Problem fixed! I wouldnt recommend this to anyone until they get rid of the cheap suction cups! If it werent for that I would give it 5 stars, but the result of the sensor coming off is to catastrophic! Oh and the fail safe back up sensor attaches by??... yep, a suction cup!

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Great ATO

Reviewers Rating Excellent!

Posted: 10/18/2015 from FARMINGTON, UT UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: I have used this ATO for two years now without any problems. I use it to draw fresh water from the basement and put it in the sump upstairs. It has both the water level sensor and the back up float valve as back up. It doesn't draw water very quickly but that does not matter because the sensor can be set to keep the water level very consistent.

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well made product

Reviewers Rating Great

4.0 5
Experience Level: Intermediate

Comments: I've had this unit running for over a year. The initial set of rollers wore out rather quickly. I was using kalk in my top off, and the tubing got clogged, setting the unit to run continuously without any liquid flowing. The manufacturer shipped me replacement rollers under warranty and it has been running perfectly ever since. Keeps the level in my sump (and as a result my salinity level) very precise. Although I switch off of dosing kalk and now use 2-part instead.

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Lasted only one year

Reviewers Rating Unsatisfactory

Posted: 9/29/2013 from DORAL, FL UNITED STATES
1.0 5
Experience Level: Intermediate

Comments: Product is ok as long as it keeps working. Mine lasted only one year.

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Great for any level

Reviewers Rating Excellent!

Posted: 12/11/2012 from Carmichael, CA UNITED STATES
5.0 5
Experience Level: Intermediate

Comments: This is a really solid product it lasted for's at least four years free of any problems or any maintenance and it works awesomely. I've used the aqua med top off and it was constantly needing maintenance and upkeep. this really works exactly like you want to and to very precise. It's really easy to set up well. I'd recommend it to anyone who wants to keep the salinity level within very tight margin. I use it Kalk plus and it keeps my pH and salinity levels very even.

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So far so good!

Reviewers Rating Excellent!

Posted: 10/31/2012 from FORT WORTH, TX UNITED STATES
5.0 5
Experience Level: Beginner

Comments: I've had it for less than 2 weeks, it's my first ATO and works great. pros: reliable, accurate, pump speed is controllable con: a little unintuitive to set up Other thoughts: expensive, but has a 5 year warantee

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