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Tunze Osmolator Nano 3152 ATO
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  • Tunze Osmolator Nano 3152 ATO

Tunze Osmolator Nano 3152
Auto Top Off

SKU: 202331


  • Good for a few months By Casey on 12/20/2014

    My second Ato has stopped working. When the unit works, it's great.
    When the first one stopped working, I reached out to BRS and Tunze. I learned that I was basically S.O.L without sending the unit back to them. I just decided to spend the money and buy a replacement.

    That was a workable plan for a few months until the second unit died on me. I've decided not to buy another. I'd rather pour the RO water in myself than purchase yet another unreliable model from BRS. I hope they find a more reliable nano ATO to promote.
  • Works well fills need By Thomas on 12/9/2014

    Bought this to top off my nano tank. Set up was easy and does a good job maintaining water level. Lot less hastle than topping of tank daily and keeps salinity more stable
  • Can't imagine how I lived without this thing By Sean on 12/4/2014

    No more lugging around jugs every other day, now it's only once every couple weeks! :) This is a huge upgrade and peace of mind. I have a small tank so this is huge in helping me keep my water parameters stabilized. This is a must-have for smaller reef tanks for people serious about their corals.
  • Works great By Meaton on 11/19/2014

    Perfect for my nano cube 28G reef tank
  • Compact. Works well. By Joseph on 10/29/2014

    The unit is very compact, works well, and maintains your water level with frequent small top offs.

    My only complaint is the pump doesn't have a suction or bracket so that it sticks to the bottom/side of your reservoir bucket.
  • Replaced Hydro-fill By peter on 10/7/2014

    I owned the IM Hydro-fill for about 6 months when the controller went out. I've only had the Tunze running for a couple of weeks but I like it better already. Triggers from slight water level drops and I like the idea of the built-in fail safe.
    Only complaint is the pump is pretty loud.
  • 14days Dead By Richard on 9/12/2014

    problem for the controller pump not working
  • Great System By John on 8/13/2014

    Works great with my 38 gallon
  • 14 months dead By Jason on 7/2/2014

    Dead after 14 months. pump is fine brain unit doesnt work anymore.
  • Great product very reasonably priced By Randy on 5/30/2014

    Love this little ATO system, and it's affordable for a Tunze product! I've had it for a week and it has been absolutely reliable with no fluctuation in my water level. My sump is a 10g aquarium with a heater, skimmer, and return pump all packed in, so it is a tight fit but it works. I left the cardboard separator between the two magnets because I had read that the magnets being too close can interfere with the float valve. It works like a charm and I couldn't be happier! Best $100 I have spent on my aquarium so far!

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