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Tunze Osmolator Universal 3155 Auto Top Off
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  • Tunze Osmolator Universal 3155 Auto Top Off
  • Tunze Osmolator 3155

Tunze Osmolator Universal 3155
Auto Top Off

SKU: 202307


  • ATO's Don't Get Better Than This! By Bernie on 12/20/2014

    The Tunze was superior to my first ATO set up which used a float valve and lifter pump. The optical sensor is great and having the second float valve to protect against overfilling is just a smart investment to protect not only your tank but the flooring around it.

    I have a controller in which I could probably have set something up myself but for an all in one package this system is great.
  • Very Cool! By Trent on 12/16/2014

    This is a great product. Easy to setup and trouble free.

    One funny thing is that the way that the LED indicator lights are mounted inside the control box allows for "bleed over" from one light to another. So, in my particular case, the way that I have it mounted inside my cabinet makes the "Too High" appear to be lit when in fact it's the "Level" light. It took me a couple of plug-unplug cycles to figure that out.

    But, it's great product. Recommended!
  • Still the best! By Martin on 12/15/2014

    There have been a lot of additions to the ATO market over the last year or so. The Tunze 3155 Osmolator is stil the best unit on the market. Reliable and dependable. If you're undecided because of price, don't be...just buy it and be glad you did.
  • Works flawlessly By GARY on 12/15/2014

    Bought one thanks to the positive reviews here and I owe the reviewers here a debt for getting it right and saving Me Money making a mistake.

    Want an ATO, click 'ADD TO CART' on this and be done with it.
    Works flawlessly
  • great product By kalen on 12/11/2014

    I recently bought the tunze ato and I had heard many good things about it. I did many months of research and I finally decided to buy it and replace my smart ato which was always failing. I would recommend this product to others
  • Tunze osmolator 3155 Top Off By Joe on 12/10/2014

    This is the best automatic top off system I have 3 of them on different tanks. Easy to set up plug and play. They been running for over 3 years with no problems.
  • The best By John g on 12/9/2014

    Very easy to set up and extremely accurate
  • Easy Setup By Evelio on 12/9/2014

    It was easy to set up straight out of the box. This is one of the best investments that I have made for my tank.
  • ONE WORD....WOW!!! By NASSAUREEF on 12/8/2014

    This top off is amazing very easy to setup. Don't waste your money on another brand cause it will cost you double and you will end up with the tunze , so buy it the 1st time and it will be the last one you will buy..
  • Simply perfect By Nate on 12/8/2014

    I have used two tunzes osmolators on different tanks and I have never had an issue. double back up (float sensor and auto times pump shut off) makes me not worrying about having water over flow. and all the install hardware added is always a bonus, like the return tube holder.

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