Great Product By Troy on 10/30/2013
Troy would recommend this product to a friend
I have only used a couple of ATO systems and this is far superior to others. It's well worth the extra money. My previous ATO used dual float switches that would calcify or be affected by turbulence in the sump. This is spot on every time. I have a larger system 300 gallons so the pump being able to run for an extended amount of time is great. I also like that the pump will automatically turn itself off after a certain amount of time as another added precaution
Great Quality! By Jorge on 9/8/2013
Jorge would recommend this product to a friend
I have to say that this system has made my life much better! I don't have to worry about adding fresh RO/DI water every other day due to evaporation, it keeps my water at the perfect level and creates a much more stable environment for my fish.
The system was incredibly easy to install and it works perfectly. This will be the only top off system I will use on future tanks.
If you need a top off system... buy this unit and don't compromise on anything else!
Great Reliable Product By Ryan on 8/25/2013
Ryan would recommend this product to a friend
Best ATO in my opinion, very accurate and simple to set up. The initial set up was easy but had a little trouble with bubbles covering the optical sensor causing it to overflow and make the float valve go off. I turned it off and let it sit in the water for a few hours, then plugged it in and has worked ever since.
A little spend, but a crucial part of the aquarium
A good product that could use a little refining. By Matt on 8/15/2013
Matt would recommend this product to a friend
Overall I found this product easy to set up and install. Once properly set up, this has kept the water levels in my sump very stable.
I do have a couple of small complaints though:
1) I wish the instructions had come right out and said to place the primary sensor in an area of the sump with NO, and I mean NO, air bubbles rather than telling you that in the trouble shooting section.
2) A better mounting system for the controller. A couple of stick on pieces of Velcro? A simple mounting bracket or even molded screw holes would be better.
3) The LED indicators are unshielded and impossible to read unless you are looking at the controller straight on.
Honestly, where is the much hyped "German quality and attention to detail?" For $200+, I would think Tunze could do better.
Best ATO money can buy By Joe on 8/12/2013
Joe would recommend this product to a friend
Great product. Exceed expectations. Even though it's a little pricey but it does come with the pump so that make it reasonable. Very acurrate and trustworthy. I expect it to work a long time.
Quality product By Sal on 7/21/2013
Sal would recommend this product to a friend
This was very fun and simple to install. It works flawlessly.
Reliable and effective By Andrew on 7/20/2013
Andrew would recommend this product to a friend
I have had this running a few months on my 80 gallon reef. The unit was relatively easy to set up, the instructions are just poorly laid out. Once set up there were no issues and it has been keeping my water level consistent.
Well worth the price!!!!!!!!!!! By jhmeresqu on 7/8/2013
jhmeresqu would recommend this product to a friend
I utilized it as my ATO for my RO/DI water return to sump system to replace evaporated water. Works great , love the fact that it has the Sensor Eye and the backup float switch. Can't get enough redundancy. A little pricey but well worth it.
Great investment By Mpek on 6/30/2013
Mpek would recommend this product to a friend
All I have to say is that this system makes my life a lot easier! As long as I keep my ATO container full it runs flawlessly. I would recommend this to anyone.
Not bad By Shalashaska on 6/28/2013
Shalashaska would recommend this product to a friend
I've had it so far for 3 days. The set up was easy. I dident have to use the instructions what so ever. The only thing I found so far that is a issue is that micro-bubbles from my protein skimmer like to settle on the optical eye, thus giving a false water low indication. I just moved it to a better location, problem solved.
Great But there is a break in period. By Will on 6/26/2013
Will would recommend this product to a friend
So for the first 3 or 4 days the "eye" sensor has a hydrophobic film which will make the sensor think it is in the air and will continuously pump water until the float switch will shut it off I recommend you leave the sensor in the sump for 2-3 without turning it on that will resolve these issues.
Overall nice ATO By PMK on 6/17/2013
PMK would recommend this product to a friend
I am pleased with this ato unit. I had some issues with the pump just kicking on and staying on. Dropped 2L of rodi into the system and stopped when the float kicked in. I couldn't figure it out and thought I might have a bad unit. So broke it down off my display and set it up on my mixing tank. The same thing happened. So ran through the set up again and disconnected the pump from the power supply wires and connected them up again. That did it. The pump no longer kicks in and stays on. Haven't seen this in other reviews or the Tube but did see a review about a weird first hour break in period. Guess it was the connection or the break in period. But its been on my display for a couple weeks now and has kept the water level very stable. Been monitoring the salinity and everything has been real stable. I think it will be a long term success. I agree with some other reviews that it seems a bit delicate for a couple hundred bucks.