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JBJ A.T.O. Water Level Controller

SKU: 206100


  • 7 years and counting By Jason on 11/18/2014

    I have bought 2 of these over the years and still use both of them. I spent $10 at HD for a small acrylic sheet and built a box with 'teeth' at the top and small holes all over it, in a corner to keep the floats in and keep the snails, hermits, and other creatures out. Just clean the floats once every 4-6 months.
    I have one float at my 'full level' (max water level - turns the pump off) and one float at my 'fill level' (minimum water level - turns pump on) inside the box.
    7 years and counting for my first one and the second one 2 or so years, for my quarantine tank.
    Note: you can unscrew the cover and re-adjust the timer for the pump.
  • not bad By dominick on 11/13/2014

    I purchased this amd after a.month 1 of the floats.went bad but after contacting brs they sent a new one and its been working perfect ever since.
  • Works good for value By Christopher on 10/14/2014

    Been using this ATO for a couple years and for the price I can't really complain. It's simple to set up and works good. Couple problems with the floats getting calcified and sticking but if you clean them ever couple months and scrape the build up there's no problems. Heard stories of them overflowing sumps but I've never had it happen yet. Good product for under $100
  • Great product! By William on 7/26/2014

    I am using 2 of these at the moment. One on my 240 Reef and one on my 75 gallon reef. Both as ATO's. I use a small pump (250gph) to deliver the water. I have been running one of these for over a year with no issues. Save your money and go this route you will not be sorry. People complain about float switches, just check on your system and do your regular maintenance.
  • Great for the price By MICHAEL on 6/23/2014

    Does what it is supposed to do. Keeps the water level right. Do be aware that you may need to adjust the internal run time if your pump can not keep up with the rate of evaporation. However that is a very simple adjustment
  • Disappointed By zedagyrl on 6/5/2014

    I have to be able to get this to work properly. I used a aqualifter for my pump and it could not pump enough water into my sump before it "time out". I adjusted the internal timer to run as long as possible and it will work for a few days and keep my water topped off then for no reason it times itself out and never resets to run again.
  • Potential disaster By Daktari on 5/9/2014

    If you are going to use this I advise that you run the inflow through a float valve. If the solenoid malfunctions in the on position you may have a flood or drastically reduce salinity depending on your set up. My LFS stopped selling this unit after several unhappy customers tried to return them. At least the float valve will stop the water.
    Another problem I have experienced 3 times in the first month is that the unit will shut off and not come back on. I reset the internal timer to allow maximum run time and will see if this fixes the problem. I attribute this to the slower fill rate due to the float valve. We shall see if the problem is fixed.

    Also if your pump is at a higher level than the end of your input hose regardless if it is in the sump water or not it will create a siphon and the water will continue to flow after the pump shuts off. You will need to install a siphon break.

    The power chord and the leads for the float sensors were way too short for my application.

    I may go back to a gravity fed set up with a 12 dollar float valve.
  • Good System, but tricky! By Rod on 4/9/2014

    Love this reliable system, but had problems for months trying to get it to work right. Finally realized that sump water was back siphoning back to the fresh water container ( 5 gal bucket) after the pump shut off. Had many friends look at the system trying to figure it out, but nobody detected the reverse siphon. After raising the tubing out of the water in sump, it has worked great.
  • EXCELLENT!! By Lawrence on 4/7/2014

    I've had mine for just over a year. Helps keep my Sump water level in check... works perfect right out of the box. No problems at all.
  • automate for best results By Michael on 3/18/2014

    After automating my top off, my tank has been much more stable and growth rates have increased. I recommend cleaning the sensors every couple of months to avoid salt build up that can cause a failure.

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