Fzone Aquarium ATO Auto Top Off Refilling System with Dual Optical Sensor for Both Reef and Fresh Tank （360P)

Works perfectly and looks very sleek/nice. I was topping off my 10 gallon every day before and now it just does it for me which is super convenient! Magnet is very strong so the sensor is secure. even with the small amount of surface movement i have it doesnt throw off the calibration. Pro Tip: the first time you prime it if its a saltwater tank and already at the correct salinity just have the pump in saltwater when it primes and then after that move the pump into the rodi water. that way it knows the tank size and you dont have to worry about it lowering the salinity

Product worked well and was quiet and easy to install

Bought this because my previous ato (prism) just would not start anymore, after 2 years of doing what I need it to do. The first fzone came and just wouldn't work from the start, so I got a replacement. After getting the replacement and tuning everything to work I was getting fresh water into my display tank again.The problem was every time I would need to do a water change and had to turn my ato off I would get red and blue flashing light when turning it on again. So I would have to do the set up process all over again which was just a pain. I would have to turn everything off and hope the fzone would work.After changing the water 3 days ago and doing what I have been doing for the past month or so just to get this thing to work, well this time the fzone just would not work anymore it stays on red and blue flashing light will not engage the pump will not fill my tank back up. When you buy equipment in this hobby you're looking for things that make your maintenance easy and are reliable this product isn't it.Skip this one don't take the risk find a better replacement maybe I'm the unlucky one but going. 0-2 seems a little more than coincidence

this has worked great for me in my salt water tank and didn't break the bank real game changer adding water when you can is a lot of work and not fun for the environment in the tank

The only things I dislike about this product are the bright LED indicator lights at night and the fact that there is seemingly no way to do a water change without recalibration of the fill time. It runs extremely quietly and keeps the water level very consistent, even in a tank as small as my 20 gallon. I add kalkwasser to my top off for a calcium and pH boost in my reef tank, and the pump seems to be holding up despite the caustic water and precipitate. This does not come with a water reservoir but does include everything else you would need to set it up. I used a 3.5 gallon clear trash can as my water reservoir, which looks nice and blends in under my desk.

Why didn't I find this year's ago?! I love rimless tanks, but absolutely hate refilling frequently from evaporation. This thing is spot on with the sensor. Mauybe the best secondary feature is the ease of doing water changes with this amazing piece of kit. It is an absolute must have!

Works well but installation instructions werent clear and vague. I installed it wrong initially according to the pictures.

The media could not be loaded. I’ve been using a diy top-off setup for awhile and was getting annoyed with setting it up/taking it down. I’ve been traveling more and this is an awesome solution to keep my fishes water topped off. The sensor looks really slick and can be easily hidden along with the tube where the pump draws to. It was fairly easy to setup if you follow the instructions. I could see someone using it as a simple waterfall feature if you want to get really crazy with it.Once the sensor, water pump are in place you plug in the ac adapter and it begins calibrating on its own. Now I simply top off the 9 gallon reservoir bucket when it needs. It’s pretty awesome to catch the water hit below the sensor and see it magically fill back up! My only gripe is that it’s only for one tank. If you’re in the hobby and want to do this to all of your tanks I could see it getting a bit costly. Overall I’m really happy with this product!