Worked until it didn't work By Tim on 11/17/2016
Tim wouldn't recommend this product to a friend
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 Deva on 11/2/2016
Deva wouldn't recommend this product to a friend
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...
Outstanding product By Pedro on 9/29/2016
Pedro would recommend this product to a friend
It's been running for over 3 years flawlessly. Great features and very easy to install and use. Mostly set and forget. Don't forget to inspect and clean the little pump and sensors once a year... That is why Tunze name is huge.
one of the great products out there. By poetjim on 9/23/2016
poetjim would recommend this product to a friend
I have been using this auto fill for over a year and it has been great, i have found that the five gallon bucket that I keep under my 60 gal. max c tank has to be cleaned a couple of times a year and that:s it, i;m getting ready to get another one for my wife:s 25 gal.coral tank.
Other options less expensive and similar reliabillity....... By Jason on 9/12/2016
Jason wouldn't recommend this product to a friend
I bought the Tunze Osmolator even though it was the most expensive ATO because I wanted to get the most reliable unit I could. Unfortunately over the last 4 months I've had continual problems with the unit. After the initial installation it would start and fill up to the optical sensor, but then a few minutes later kick back on and continue filling up to the back-up float switch. I run Kalkwasser in my ATO so that was pretty concerning.
After removing, cleaning and reinstalling the unit seemed to function ok for a couple weeks but not it kick's on the first time it's plugged in but stops after 15-20 seconds and never starts again. I've tried cleaning, repositioning the sensor etc. but no improvement.
Just buy the JBJ and keep the float switches clean on a regular basis.
Great idea just willl not function as promised By Joesreeftank on 9/4/2016
Joesreeftank wouldn't recommend this product to a friend
I have had this for about 18 months, I loved a raved about it at first, Problem I have had is the pump will stop shot. Tunze has sent me about 4 new pumps. They all do the same. pump will only run about 15 seconds. the controller says pump is on but its not on. I paid 200 for this system so I really wanted it to work, I am going to cut my losses now because as you all know this ATO is critical part of keeping my reef tank stable
Quit after less than 2 weeks By BC on 7/8/2016
BC wouldn't recommend this product to a friend
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 Will on 6/20/2016
Will would recommend this product to a friend
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 Steven on 6/13/2016
Steven would recommend this product to a friend
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 tubby on 6/7/2016
tubby would recommend this product to a friend
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.