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JBJ A.T.O. Water Level Controller

SKU: 206100


  • Simple And Works! By Peter on 5/6/13

    This is a great product for the price. I use it on my 40 breeder QT tank and have had no problems.
  • A must have By Barry on 4/22/13

    I can't believe, I went so long with out one...lol
  • Tends to stick By David on 4/14/13

    For the money it is an ok ATO however the floats tend to stick and will mess with your salinity. I had to put both floats in the sump as a safe guard so that if one float fails the other will turn off the ATO. I have had multiple instances were it has nearly overflowed my sump.
  • Good, simple ATO By bruce on 4/13/13

    The JBJ A.T.O. system is a good, simple auto top system. I have been using it with absolutely no problems. My only complaint is I wish there were more mounting options included with the sensors. I think if you are using a traditional system, you would have no problem. My water storage is a little unique, so I had to modify the sensor bracket.
  • Worth the money By Chavinpat on 4/8/13

    I love JBJ product. This ATO is well designed and easy to set up. I will order another to use from my freshwater tank.
  • I have had the unit work well in my 20 gal nano tank but sometimes the sensor gets invaded by a snail and causes the tank to overfill and my salinity goes to crap! By Louy on 3/27/13

    What this unit really needs is a way to double up on the fill sensors. That way if a snail gives one a ride it would not cause the tank to overfill and ruin your salinity. In other words, the unit would have to recognize when both sensors are calling for top off water to come on.
  • well worth the money By Chris on 3/25/13

    well constructed, and love the ability to use in many different ways.. I can't believe, I went so long with out one...lol
  • Simple By Ryan on 3/21/13

    The JBJ ATO is a very simple design. It has a nice looking control module that nicely mounts to the inside of my tank stand, hidden but still up off anything that might get wet. The only drawback I had was that there was no good way to mount one of the sensors in my RODI reservoir so it kind of just floats around in it.
  • Grea, with small set-back By Tommer on 3/12/13

    This is a great ATO switch. The only thing that I don't like is that the ATO checks every ten seconds to see if it is full and then turns off. So on a smaller tank that not turning off for possibly 10 seconds might cause salinity swings.
  • Works Perfectly By djwally13 on 3/11/13

    I installed the JBJ ATO over the weekend, it doesnt come with a pump so I purchased a Toms Aqua lifter pump from my local fish store. The unit works perfectly, I check my water level every morning and the level is always at the line I drew on the side of my sump.

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