Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue

This was easy to set up. It is small and discreet. It has stabilized the water level and appears to work as expected. The sensor does what it was created to do. So far, so good! And the price point is perfect.

Honestly one of the best purchases I’ve made for my aquarium, although I don’t use it for its intended purpose. I use if for water changes, putting the pump in my aquarium with the sensor off to the side, and the water goes into a bucket, and for refilling I unplug the sensor, move the pump to the bucket of new water, put the sensor in my aquarium as indicated in the instructions, and then plug the sensor back in. It is so, so, so much easier than getting my siphon started, stresses my fish out WAY less, and creates way less of a mess too. It obviously doesn’t work for vacuuming gravel, but it’s made maintenance on my aquarium so much less stressful, and freed up a decent chunk of time too.

Worked alright for about a month and then one day it just pumped every bit of my fresh water into my tank. Tried cleaning the whole assembly and letting it go again and it did the same thing

Easy to set up and works great. It keeps my tank’s water level right and the pump is quiet. Everything feels well made and seems reliable. Definitely a nice upgrade from doing the top offs by hand.

I've had this saltwater tank for awhile and I should have purchased this auto top off so much sooner. This unit really has made maintaining my fish tank so much easier. The size of this is less than an inch and it doesn't stick out in my tank either. It fit perfectly on the rimless setup without taking up a lot of space. Setup was super easy and everything I needed to get this running came in the box. Overall, it took me about 15-20 to have this setup and ready to use. I really like the safety feature it has that monitors and refills my tank with an auto shut off. I have left my house for the weekend and came back to absolutely no mess but my tank maintained its level of water. Plus, once its attached to my tank, it doesn't fall off either, very sturdy. Plus the other thing I noticed is that this whole thing doesn't make any noise. All I hear is running water every now and then and that's it. There have been no sudden swings of stressing my fish out either.

I don't want to completely diminish this product. It's not hard to assemble or use. It's small and indiscreet if you can cover the light of the sensor. For the price you pay it's decent. I do worry that the sensor maybe isn't as water proof as it needs to be. It will likely stop working before a year. I have purchased two. One is still going the other has a solid red light when powered on and in place and will no longer operate. I have tried using both distilled water and 99% alcohol to clean the sensor and it has not worked. I even soaked the sensor in alcohol overnight. The only other thing I can think to try is maybe cleaning the pump. I'm pretty certain it is finished though. If you can, try to place the unit and disturb it as little as possible. I think when I removed it recently and let it dry that was what ultimately did it in. Simple set up and mechanism. Decent price and design. Poor longevity.

Very easy to set up. No complex programming. It's not loud or annoying, but you can hear it. Very briefly, I forgot about it. Along with using to top off, this will be great to use when cycling my Axolotl tank. The price is good, helps when you are busy, but as with everything, you have to monitor it, and it does have an alert.

This item is a great addition to my aquarium. It let's me set the exact height I want the tank, and is Keeps me from having to remember. I also like being able to hide the reservoir under the tank, and the pump's function that turns it off if there is nothing to pump. It has already saved me! If you want to not deal with constantly refilling your small tank, this is a great deal.