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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


  • Great Product By Harris on 11/23/2014

    I've had this for about a month now. It was really easy to set up and has saved me time by not having to top off my sump by hand. All around a great addition to the tank!
  • awesome By dolpator on 11/23/2014

    This top off system is awesome. I have never had one issue with it and it never misses a beat. I used the JBJ auto top off on the past but like the fail safe options. It has been very dependable. And would recommend it to any one. Great product
  • Works and easy to setup. By Mario on 11/19/2014

    Instructions were easy to follow. One call to Tunze was answered promptly when I had a question about whether all magnets were waterproof.
  • Never Fails By FirstContact on 11/10/2014

    This is a great piece of gear. It has never failed on me. Once a year or six months or so, I'll clean the optical sensor from salt. It's in a 100g Rubbermaid stock tank. The pump is in a 32g Brute, and the top off goes through my kalk reactor first.
  • Perfect Tool By Steven on 11/6/2014

    Really satisfied with my purchased. Works exactly how it should so I don't have to worry about it.
  • So Far So Good! By Randy on 10/23/2014

    This seems to be working like a Charm. However I did have one issue with it right away, for some reason the pump wasn't working when I first plugged it in. I unplugged it for several hours and came back to it to see what the problem was and when I plugged it back in everything worked perfectly. It has kept my tank at a perfect level so far. I have it hooked up with a 5gal tank reservoir and it has given me less time worrying about water level and more time loving my tank!
  • Amazing Product and never fail By Michael on 10/9/2014

    I love this ATO!!! I don't ever have to add more water to my sump day in and day out. I have a 10 gal sitting inside tank stand and it lasts about 1 1/2 weeks before having to fill it again. There has been a few power surges since installing it. It has never failed to come back on or sound alarm. Thank You Tunze and Thank You BRS for carrying this item.
  • Stability By Valerie on 10/5/2014

    This unit has not failed once. I use Kalkwasser in my auto top water and the pump hasn't failed yet. The pump is a little bit loud but the BRS staff told me to pull the airline tubing out a little bit and it made it much quieter.
  • functional and efficient By Steven on 9/8/2014

    I have used the Tunze for two years now and it meets my expectations. One needs to take seriously the caution to not have the feeder hose under the surface of the aquarium water level. I flooded my office twice doing just that. Also, the pump has a 6 month to a year longevity and they go out without much fan fare. Keep a couple extra pumps, at 23 dollars, on hand. My final caution is not a fault of the unit but I have an auto feeder in my lower tank and when the feeder was too close to the optical sensor flakes of food caused the unit to think the tank was at level and it failed to fill. Keep the food as far away from the sensor as possible. Beyond these concerns, it is a great unit and very dependable.
  • Gold Standard of ATO By Keith on 9/4/2014

    The system comes with everything you need to get an ultra-reliable and well built auto top off system in place on your aquarium. This is a must if you want to keep your parameters consistent and your tank running as it should. Make sure and put the rubber feet on both halves of the magnets to keep them from sliding around. I love the redundancy of an optical eye, a mechanical float switch and then a timer on the pump.

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