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

Simple mechanism, and it works very very well. The flow is quick and the machinery is actually rather quiet, which is good. The only note to worry about is in the beginning or if it’s not been submerged in the water, sometimes the pump won’t pull in water. All it is, you just nudge it a few times; chances are, there’s air stuck in there and you have to knock the air bubbles out of there so it can pull in the water. Bought two of these for the price of one, so certainly worth the purchase.

Ha funcionado muy bien

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 didn't buy this as a permenant top-off solution. That's something I do as needed manually. I bought it for when I take long trips. I recently used it for a 5 day trip and it worked just fine keeping my water level. My aquarium is an open top so I have a good amount of evaporation. The sensor worked well and i kept the fill hose above my sump water level to prevent back flow.

Fairly simple design. Uses a very small pump to pump water a sizeable distance. pump burned out after about 3 months of use and now have to buy a whole different setup.