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
291 Review(s)
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  • Quit after less than 2 weeks By on 7/8/2016

    After a loss of power,short term and yes it was on a surge power bar,Checked all aquarium,allOK.Wife comes in 1/2 hour latter says an alarm is buzzing.Checked it out sump high level ;luckily float stopped pump.So much for Tunze as Best ATO.
  • Easy top off By on 6/20/2016

    I bought a 5 gallon tank next to my sump. Threw this in the tank with my RO/DI water and worked instantly. Very convenient, easy to use, accurate.
  • Awesome product By on 6/13/2016

    The Tunze Osmolator was a great purchase. I used to have to fill my sump manually every day. This allowed me to to focus more of my time on other areas of the system. I have it plugged into my Apex controller and programmed to shut of during feed mode to keep the alarm from going off. Also have the Apex to shut it down if the salinity in my take drops. Even without the Apex this would be a "must need" purchase.
  • replacement By on 6/7/2016

    I been using this ato since i started the hobby back in 2014. Well the ato finally died on me, i was looking around for a new ato - wasn't really impressed with anything else out there. Figured i already had the experience with the tunze ato, why switch when i already know how this product already performs. Highly recommend.
  • Great ato. Works as advertised. Pump fits in 5 gal jug By on 5/17/2016

    This top off works really well. The only thing to remember is to prime the pump but after that it runs like a champ.
  • So long to my KW drip By on 5/6/2016

    After months of setting up an evening kalkwasser drip (and often forgetting to set it up), this is a real time saver. Once a week now I fill my top-off bucket and it keeps my sump consistent and slowly doses my KW. I'm a fan.
  • You will HAVE to replace in 2 years By on 4/26/2016

    My recommend to buy is very tepid. You will only get about 2 years max out of one of these units. I really want to like it, but, the eye stops functioning after 2 years. All the cleaning of the eye will NOT make a difference. I have 1 hour to get to bed and get up in the morning for an early flight and I'm in travel he!! week, 6 flights. I can NO longer rely on this essential piece of equipment to maintain my tank. I will probably loose several SPS as a result of my jacked up tank all because this ATO failed --- AGAIN. This is the 3rd one I've bought that does this, it is NOT an isolated one off case at all. Poor quality in the long run. I will never buy again.
  • best in the market By on 4/10/2016

    I feel safe that this will not fail and works great with the Apex or without
  • No worries By on 4/5/2016

    I purchased the second one, and as for piece on mind extra pumps, one pump failure thus far. It is a good product, price but good..
  • Nice product By on 3/16/2016

    The instructions and a bit weak but I was able to look online and get the info I needed. Overall this is a bit expensive for what it is but works great. The pump is louder than I expected even though I have it turned down as far as it will go (nano setting).