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

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 would like to start of buy saying I have been in the aquarium hobbies for over a decade and had always taken steps to reduce evaporation as much as reasonably possible. However after many years of topping off my tanks manually I decided to look in to an ATO, after reading many reviews and seeing a few videos I settled on this one and I'm glad I did. The ATO is very simple to to set up in just a few minutes. The sensor that goes inside of your aquarium is very small and the magnet used to secure it in place feels adequately strong enough that I'm not worried about it falling inside of my aquarium. I purchased a smallish 7 gallon water container one would use for camping to use as a reservoir for hold additional water and the small pump head fits very nicely inside. So far it has been working great. There is very and I mean very little noise heard from the pump when it kicks into action and the only time I've heard it was when everything in the room is shut off and its stone silent in the room. The only draw back that I can think that may throw some people off is the sensor it's self is a very very bright night light so best not to use in a bedroom I'd say if you like the dark that is but seeing as the aquariums in question are located in my home office / game room it doesn't bother my in the least. I have plugged my ATO into a smart plug to make water changes and gravel vacuuming easier as I can disable it while doing so. Hopefully people find this review helpful. 😊

I've now purchased 3 times. All 3 of these are absolutely garbage. They work for ruffly 1 to 6 months and then ultimately fail. Reviews say it's great, but notice none of the reviews mention "Years of use". Longevity wise, this gets 1 out of 10. Waste of money. The pump is a 2 out of 10. It's slow, small and breaks easily. It's the kind of pump you'd expect to pay about $1 for. The sensors are NOT water proof and in fact the sensors will take in water and then create a film inside that destroys the sensor. All in all, this is an epic waste of money. Amazon should be ashamed to sell this product, as it's designed to break and you will need to replace it again and again and again. Quite frankly, I'd like my cash back. This is a scam product in which I have 3 of. 3 is enough to prove a point. If the seller or anyone at Amazon would care to interject, maybe we could establish some accountability. For this product, there is none. Buyer beware. This is a disposable product with a shirt lifespan. Absolutely rubbish.

Sensor works well. Easy to set up. Keeping tank topped off perfectly.

Works as intended, and is great for the price. It only failed me once and of course it was while I was away for a week. It lasted 2 years and the salt creep broke the seal on the optical sensor and water got in. Fried the sensor. But for $40, Id say it exceeded my expectations. I wouldnt use this on my big tank with expensive stuff, but a smaller tank is perfect! I will just buy a replacement and maybe try to reinforce the seals on the new one. If only they sold the sensor separately

This water system is fantastic so far and hopefully it stays that way! It was really easy to set up. The quality is great and it doesn't make much noise which is nice and so far so good! I'm Really this one lasts for a long time!

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.

Got on time, easy installation and works perfec!!! Recommend 100%

Ha funcionado muy bien

I bought this ATO for my nano saltwater aquarium and would not buy again. It failed twice in about 4-5 months. The magnet is not strong enough so any large turbo snail can push the sensor up, making the water level go up. Also, the glow of the light is annoying at night. Pay more money now for a good ATO with a strong magnet and a cover over the light sensor

Excelente producto muy buena precisión y fácil de instalar

Muy bueno el producto comple perfectamente con lo especificado

Je suis revenu de vacances pour m’aperçevoir qu’il faisait un bruit horrible et que le moteur de la pompe à eau n’arrivait plus à pousser l’eau dans le tuyau vers l’aquarium. Argent gaspillé et faillit tuer tous mes poissons d’eau salée.