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
305 Review(s)
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  • Work with no flaws By on 1/27/2017

    Up and running on my 75 for a month with no problems. Should have gotten a Tunze 3155 Osmolater Universal Auto Top from the start. My reefer friends that are using other ATO all seem to be having issues.
  • Wouldn't set up a tank without one By on 1/25/2017

    Purchased one of these for my Biocube 29. In my experience, it is especially difficult to maintain water parameters in a tank of this size, but the Osmolator takes care of this chore for me consistently. I purchased a small ottoman that sits beside the tank and hides my top-off reservoir. I was initially reluctant, given the price of the unit. But, once installed, I have never regretted my decision.
  • Tunze osmolator By on 1/19/2017

    Good product however the pumps a bit loud and the optical eye is a bit off at times however there is the float switch to assure it never runs over
  • Performs as expected By on 1/17/2017

    Detailed instructions and Great system once it is up and going. Trying to thread the tubing (that was supplied with my kit) was VERY difficult. You can hear the pump a little more than you would expect from a DC pump but its not loud in the grand scheme of things. Overall I love it and would recommend it to my fellow reefers.
  • Awesome By on 1/16/2017

    Overall works well, big time saver, and adds water as needed avoiding dumping a large amount of fresh water in the sump at once. Only issues are it somtimes get confused when powering on and overfills until the float switch stops it. Only other issue is the pump is really noise. Added tunze power adapter, so I could use a much less noise pump. Overall still a great product.
  • WOW By on 1/10/2017

    Very simple to setup. Everything works great on this guy. The only downside I can see is that the pump turns on when you plug it in every time. I have a large tank so this isn't a problem. Peace of mind is worth every dollar :)
  • Great product By on 12/21/2016

    I don't know how I've survived so long without this! So far, this is great. It is dead silent. It also maintains a very accurate level in my tank which keeps the salinity rock solid. Yeah it was a bit of a pain getting the hose into the pump, but would you rather it be easy and possibly pop off? The only improvements I would like to see would be a low reservoir function (either a sensor or current/flow monitor to alarm on a low reservoir), and a better hose mount at the tank.
  • Good, but you would expect more from a German made product. By on 12/2/2016

    When I received the boxes at the door and opened them I was five stars for sure. As I was putting it together the hose for the Osmolator won't fit in the hole made in the Clear 5 Ga Trigger ATO container. OK, four stars (they should of coordinated thier product with some of the most popular ATO containers). I had to drill out, ouch, my laser cut hole with a drillbit stupid me, it chipped my brand-new ATO container. I should've just switched out the supplied hose with a standard sized one that I have, it must be because the German product is metric. Then pushing the hose into their own supply pump was really a pain. Once again the hose was too big or it's a very, very tight fit (please BRS, a warning on the fitment issue or a hose that will fit the hole and the pump would be nice). OK, three stars. Then in trying to mount the hose to the Ruby Trigger sump their own mounting bracket clip that they use is too small for the hose once again and the plastic screw in the hose holder is too big for the plastic clip. So outcomes the drill once more, luckily this time I didn't break anything. Should be down to two stars now but this is the best ATO on the market. OK, three stars. I hope I don't have any of the other problems in the other reviews that should be the most reliable and safety back up system there is. I've been running it for about an hour now.
  • Worked until it didn't work By on 11/17/2016

    Worked great for two weeks... now it is acting weird and not dispensing water. I have to manually unplug and plug it back it to get it to start working. It appears to be signalling the pump to start it every couple seconds. I can hear it inside my 5 gallon container. On then off constantly. Pump just kind of jerks on and off in water container.
  • could be better for the $$ we pay. By on 11/2/2016

    OK I got this ATO for my 90 reef. 1st think i noticed was the pump was crazy loud like the sound of airplane wings during landing. so I got a replacement for BRS same thing. tank is in my room and the pump wakes me up all the time.

    next is that it its so sensitive ( a good thing) but it tunes on and off a few times a min. ( maybe that could be a fluctuation in my siphon but once again the load pump makes me cringe.

    so all that i could live with barley . went on vacation and the power went out ( of course right things always happen when we are on vacation ) the power was off for a few hrs. once back on the ATO did not reset it self. so it failed got a txt from tank setter and had to have her pour water in sump my hand.

    so all that said I would not recommend this ATO to many bugs for the price. going to order the micro smart ATO for my nano and see how that works.

    I give it 2.5 stars...