Fzone Aquarium ATO Auto Top Off Refilling System with Pump, Aquarium Water Refiller with Dual Optical Sensor, Upgraded QST Tech and Smart ETFT Algorithm for Both Reef and Plant Tank

Reviewing this after about 6 months of use - This works perfectly, its easy to set up and hasnt failed yet. i fully trust this while im on holiday. It costs much less than my old ATO, even if it does fail i will buy again.

Easy to set up and has worked perfectly so far.

Wouldn’t recommend didn’t last very long broke fairly quickly

Really easy to set up and is working great

Good bit of kit. Only issue I have found is when doing a water change you have to reset the sensor every time. Which can't always be done straight away due to the water level.

I have used other ato units in the past, all being based upon the float switch design, as you can imagine the float switch can fail with simple things, however I must say that I’m impressed with the innovation behind this device and over the past two weeks there has not been a doubt in my mind about device failure, great product and I will be a returning customer.

Can be a pain to calibrate to the desired level, during first setup or after power down the pump fills the tank to the overfill sensor, if you have a tank like mine with the water high up this feels sketchy.The sensor itself is held with a magnet and can very easily be moved during cleaning, the manual states that the sensor calibrates a timer based on how long it takes for the water to refill from the low to high sensor however during water changes the pump will continue its filling process for a good 10-15 minutes before throwing an error, if for whatever reason i knocked my sensor higher or out of the tank without realising then this is the length of time water would be getting pumped into my tank.The hose bracket also causes me concern, it holds the rubber hose with a plastic screw, i can easily see this coming free and falling down the back of the tank, this has the effect of making me constantly check it whenever im around.All that being said, this has removed a major chore of having to top my water up daily and im relatively happy with the purchase, not sure i could leave this on while on holiday however.

This is a great ato for a marine tank. At first I was skeptical due to the negative reviews but it was so easy to set up and we've not had any problems. It does the top-up without us noticing due to it being so quiet and the led lights really help if you do run into any bother. The only problem is there is no alarm on this but as I said not has any issues so far been using for the last 6 weeks