Tunze Osmolator Universal 3155 Auto Top Off

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
252 Review(s)
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  • Best ATO By Joesreeftank on 8/23/2015

    Do not screw around with the others, This one does what it says, It keeps my Sump right were I set it, I have a 40 gal sump and if it looses less than a couple of pints it kicks on and tops off..Easy to install
  • Must have item By Jim on 8/11/2015

    Great auto top of package, very easy to install and get set up. Pump is a little loud for how small it is (only hear it when in the room, which i like since I know it is working). The price is a little high, but totally worth it once you see it in person and have it setup. Would definitely buy again.
  • It's a Must Have By Derek on 8/10/2015

    Hands down the best ATO, I have every owned and I can't see myself using anything other than this product. Wrongs flawlessly and most definitely it put me at ease not having to worry about adding water or flooding my sump.
  • Excellent ATO System By 40g Long on 7/22/2015

    After we finally got our tank set-up, I was amazed at the amount of evaporation from day to day. Being new to the hobby, I was concerned with maintaining stable water parameters. . I watched all the videos, researched the high tech models to the DIY versions, and decided the Tunze would be the ATO for our system. Since it's installation it has been performed flawless. I highly recommend this product.
  • great product By rrosenb on 7/22/2015

    So easy to install and works perfectly. I wish all aquarium products could be more like this
  • Excellent ATO By Conny on 7/22/2015

    Well built, easy setup, reliable- excellent ATO
  • Works great By Dave on 7/17/2015

    This thing works great!! A little pricy compared to other top off brands but very dependable and unlikely to fail. I would recommend this product over all the other ones on the market. Easy to install too!
  • Solid and reliable By Steve on 7/16/2015

    The Tunze 3155 Auto Top Off system is the best there is. This is my second 3155 system, just installed on my new 185 gal tank build. My first 3155 system (on my first,180 gal, tank build) continues to function perfectly, with no issues, after more than 3 years of service.
  • Nice simple and reliable By JEMM55 on 7/14/2015

    Better than the rest...the electric eye beats the mechanicals hands down
  • Loving my Tunze ATO 3155 By A.J. on 7/13/2015

    After a fair amount of research and reading many customer reviews I pulled the trigger and bought the 3155. Works perfect and only took a few min to set up. It really take the stress out of traveling, not having to worry about your water level. ALSO - has kept my salinity rock solid for over 3 months now, which my corals are loving!!

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