Terrible By Brandon on 8/31/2015
Brandon wouldn't recommend this product to a friend
The reason why the normal tunze osmolator does so well and sells so often is because the eye sensor it has well in this Nano version there's none witch makes this just as good as a lowest model auto top off u can buy for a few dollers or even make not worth it and don't use it trust me
Great Nano ATO By Sterling on 7/23/2015
Sterling would recommend this product to a friend
This is an excellent ATO. I'm new to reefing and everywhere I read ATO's were on top of the suggestion list. I bought this with everything else to setup my new tank and I'm very glad I did. It was easy to setup, works as advertised, and leaves a little footprint. Worth the price and it's one less thing I need to worry about.
Love this thing By AdamNC on 6/29/2015
AdamNC would recommend this product to a friend
Been using it for a few months now with little issues. One issue is with the supplied hose the pump in the reservoir tends to sit sideways. But that's not fault of the actual equipment just the hose. And on a rimmed tank it does make the water line sit about 2-3mm below the rim. Nothing major just a peeve but I'm used to it now. It actually allows me to see that the water line is constant in the tank. Other then those two things I love it. Mechanically I've had no issues.
Should have got this a long time ago. By DadE on 6/26/2015
DadE would recommend this product to a friend
Works great and on my way to a stable reef.
excellent By Redick on 6/23/2015
Redick would recommend this product to a friend
I placed this on a 60 gal. It does exactly what it advertised very very well. An excellent product. East set up and easy to use.
Very good product and easy to setup By Joe on 6/18/2015
Joe would recommend this product to a friend
very good product, easy to setup and it works very well
Even a caveman can do it! By Ed on 6/1/2015
Ed would recommend this product to a friend
Easy setup, Works like clockwork! no more salinity variability, Woohoo! I use a 2.5 Gal reservoir and I have plenty of water for 1 week of top-off!
Painless set up works great!! By Amin on 4/27/2015
Amin would recommend this product to a friend
This ato work as advertised. Its easy to set up and helps keep my parameters in check!!
Convenient By Mark on 3/26/2015
Mark would recommend this product to a friend
I added this to a rimmed 29 gallon tank. In order to keep the water level above the outside trim I had to cut part of the inner rim off to raise the magnet and float switch. This wasn't necessarily an issue because I knew I was going to have to do that before I bought it. Just something to be aware of. I find that it will turn on and replace almost exactly the amount of water I had been adding manually each evening so that's nice. Since it's on the main display it doesn't turn on very frequently. The pump is audible but not terribly loud and it doesn't stay on for long. I actually like that I can hear it. I know it's working! An issue I have been having is due to the setup of my tank I had to place it near the hob skimmer and bubbles from the outlet on the skimmer have a tendency to get trapped under the float and make it not operate correctly. It's not a huge problem and could be avoided by placing the float farther away from something that produces bubbles. I also have a wavemaker that can make the pump turn on and off from the waves it produces. Again that can be addressed by creating less waves or putting the wavemaker and/or ato on a timer. I'd recommend this because it works pretty good and has a fairly small footprint if you want to keep it in a display tank. If you have a sump the issues I've had probably wouldn't exist. There might be some better ones out there but it suits me for now.
GREAT SO FAR By MARK on 3/25/2015
MARK would recommend this product to a friend
I AM THE OWNER OF THE RED SEA MAX 130 C. THE VARYING WATER LEVEL IN THE SUMP HAS MADE THE OPERATION OF MY SKIMMER A NIGHT MARE! THE ADDITION OF THE NANO 3152 KEEPS A CONSTANT LEVEL IN THE SUMP AND SOLVED MY SKIMMER WOES. SET UP WAS EASY. I SUSPEND THE PUMP JUST ABOVE OF THE FILL CONTAINER BOTTOM AND IT WORKS GREAT.
Good for what I needed By Eric on 2/23/2015
Eric would recommend this product to a friend
This is my first auto top off and it is working fine for what I have. The size is good and the pump is running great so far. I have only been using it about a week with only one small issue. That is, I can't find a way to have the pump sit level on the bottom of my reservoir. I think it will just take some time for the hoses and cables to stretch out. Overall, good buy for me though.
Dosn't fit rimmed tanks very well By Adam on 2/19/2015
Adam would recommend this product to a friend
If you have a top rimmed tank this will still work but it will sit low in the tank, making the waterline below the rim. Contacting Tunze now to see what they are going to do about it if anything. Love their products but the mount for the float switch needs to go back to the drawing board. So as of now I either have to deal with the low water line or fabricate a custom mount. If the float switch fit better I would have given it a 5 star.
Nice auto top off By Todd on 2/8/2015
Todd would recommend this product to a friend
Easy to set up and works great. My only complaint is that it needs a suction cup or something so that is attaches to the bucket as it just lays on its side without this
Good for a few months By Casey on 12/20/2014
Casey wouldn't recommend this product to a friend
My second Ato has stopped working. When the unit works, it's great.
When the first one stopped working, I reached out to BRS and Tunze. I learned that I was basically S.O.L without sending the unit back to them. I just decided to spend the money and buy a replacement.
That was a workable plan for a few months until the second unit died on me. I've decided not to buy another. I'd rather pour the RO water in myself than purchase yet another unreliable model from BRS. I hope they find a more reliable nano ATO to promote.
Works well fills need By Thomas on 12/9/2014
Thomas would recommend this product to a friend
Bought this to top off my nano tank. Set up was easy and does a good job maintaining water level. Lot less hastle than topping of tank daily and keeps salinity more stable
Can't imagine how I lived without this thing By Sean on 12/4/2014
Sean would recommend this product to a friend
No more lugging around jugs every other day, now it's only once every couple weeks! :) This is a huge upgrade and peace of mind. I have a small tank so this is huge in helping me keep my water parameters stabilized. This is a must-have for smaller reef tanks for people serious about their corals.
Works great By Meaton on 11/19/2014
Meaton would recommend this product to a friend
Perfect for my nano cube 28G reef tank
Compact. Works well. By Joseph on 10/29/2014
Joseph would recommend this product to a friend
The unit is very compact, works well, and maintains your water level with frequent small top offs.
My only complaint is the pump doesn't have a suction or bracket so that it sticks to the bottom/side of your reservoir bucket.
Replaced Hydro-fill By peter on 10/7/2014
peter would recommend this product to a friend
I owned the IM Hydro-fill for about 6 months when the controller went out. I've only had the Tunze running for a couple of weeks but I like it better already. Triggers from slight water level drops and I like the idea of the built-in fail safe.
Only complaint is the pump is pretty loud.
14days Dead By Richard on 9/12/2014
Richard wouldn't recommend this product to a friend
problem for the controller pump not working
Great System By John on 8/13/2014
John would recommend this product to a friend
Works great with my 38 gallon
14 months dead By Jason on 7/2/2014
Jason wouldn't recommend this product to a friend
Dead after 14 months. pump is fine brain unit doesnt work anymore.
Great product very reasonably priced By Randy on 5/30/2014
Randy would recommend this product to a friend
Love this little ATO system, and it's affordable for a Tunze product! I've had it for a week and it has been absolutely reliable with no fluctuation in my water level. My sump is a 10g aquarium with a heater, skimmer, and return pump all packed in, so it is a tight fit but it works. I left the cardboard separator between the two magnets because I had read that the magnets being too close can interfere with the float valve. It works like a charm and I couldn't be happier! Best $100 I have spent on my aquarium so far!
To the Top! By Taia on 5/21/2014
Taia would recommend this product to a friend
Tunze has a great product here! It has been working flawlessly to keep my tank topped up and my levels much more stable. It's really one of the most essential pieces of equipment you can buy, it's well made, but my only gripe is the quick connect from the pump to the controller itself. I'd prefer something a bit more salt creep proof! But overall, I'll be buying another one for my next tank as well!