Osmolator Universal 3155 Auto Top Off - Tunze

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

Osmolator Universal 3155 Auto Top Off - Tunze

SKU: 202307
277 Review(s)
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  • the best By bigjay on 1/21/2016

    had my reef tank 2 year ben top off the water my self the tune osmolator rocks keep my sump at the prefect level it the best buy it best thing i got for my tank
  • The Mercedes of ATOs By jsbull on 1/2/2016

    This thing is awesome. Redundant shutoffs, quiet operation, peace of mind. I highly recommend it.
  • The Mercedes of ATOs By jsbull on 1/2/2016

    This thing is awesome. Redundant shutoffs, quiet operation, peace of mind. I highly recommend it.
  • Great product By timothy on 12/27/2015

    Very easy to setup. Very accurate. Never have to worry about topping off
  • does what it does By sadt3arz on 12/26/2015

    Awesome product, easy to setup and works perfectly and flawlessly. Highly recommend. Only reason i didnt give 5 star is because the pumps kind of loud. My tank s in my room and at night when sleeping i can hear it turn on and off everytime it refills. I wish it had like a night mode or something. Be careful with the placement of the line so you dont end up syphoning ur reservoir. I learned that the first day.
  • Great product By Mike on 12/18/2015

    This is my third (sort of) osmolator. Some years ago I bought a used osmolator after researching what seemed to be considered the "best". I was particularly captivated by the optical sensor. Over the next few years I had to replace a few parts, but as my unit was used I felt that that was fair. My two biggest issues were that if the water ever dropped too far the controller would time out, or overheat or something and never restart. The second issue was the noise that the pump made. I even replaced my old one and the new one was louder. When the ATO became totally unreliable I decided to research what to replace it with, thinking that I would NOT pick another tunze because of the above issues. However, research again led me to the Tunze so I took a chance on a great Black Friday sale and have been running my new osmolator for a month now. I LOVE it. Reliable and quiet - who could ask for anything more.
  • Pretty much perfect By Olliesshop on 12/17/2015

    After trying other types and brands of ATOs, I finally decided to go with the Tunze 3155. I love that I can depend on it to keep the water level at a fairly precise level. The only thing that bothers me a little is the pump turns on every time the ATO is turned off and on. So if I have to cycle it off an on it will result in a the water level being too high and overdosing some on my Kalkwasser. This is something I'm adjusting to, though.

    Overall, this is a great product and I would highly recommend it.
  • Great Product - Great Features - Sleep GOod at Night! By Steve D on 12/16/2015

    I have had this setup for about 2 weeks now and my lower back is jut loving it! I used the separate mounting magnet for the safety / overflow sensor as I placed mine in a 45 gallon sump in the return chamber. I had done a lot of research and looked at countless reviews and this unit always came out ahead of the rest. It is a bit more $$ than some of the others but it is well worth it. I don't miss any sleep wondering if my sump will flood in the middle of the night as I have tested the overflow sensor and alarms. Unit works very well. The BRS videos were very helpful in getting this setup, explaining all the parts and features. It only took about 15 minutes to get everything in place and the little pump actually fits nicely inside of my 5 gallon containers. Great Job Tunze & BRS!!!!
  • Second to none! By John on 12/16/2015

    This is simply the best ATO one can buy. Extremely easy to set up and with several mounting options, you can't go wrong. Keeping your salinity stable is no longer problem.
  • Can't beat the unity; Can't beat the track record! By Steve on 12/13/2015

    Great ATO! Love the optical eye. Easy set up and works flawlessly. With all the modification and accessories possible, it simply can't be beat.

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