Awful By Greg on 11/20/2015
Greg wouldn't recommend this product to a friend
I have given up on it after 3 months. Once a week the alarm goes off and it shuts down. Once every few weeks it goes wild and overflows. No Rhyme or reason to the failures. Far more trouble than it is worth!
Look elsewhere probably By Jim on 11/6/2015
Jim wouldn't recommend this product to a friend
I have had mine for a year. I don't trust it. I have it on a timer on my RED SEA 130 which automatically resets it once a week at midnight by shutting off the power for 5 minutes and rebooting it. If i leave for a trip, i set that to once ever other day.
its very picky about amount of water it adds time to time and will fault out if the tank level is changed by maintenance or something. lets say a hand in the tank to fix a coral, or rock will result in an error and it shuts down. I'll never buy a second one. But its small, so far the pump keeps keeps chugging along and i just keep a very close eye on it twice a day and reset it if i think its acting up. Good idea but a small range of tanks will work with this unit. Sump level has to stay constant. A simple feed mode or something would render it useless on a typical apex system setup since the sump level would change randomly and all of a sudden and give it an error. Its tracks how much it runs every time and runs a self safety program that allows for a small error between the last n next dose time/ amount which is the root of my main issue with it and out weights the idea of the safty that could result form such a idea. I have come home to beeping many many times and left me dry several times, but never over dosed the tank with ATO thus far.
Easy By Abraham on 9/6/2015
Abraham would recommend this product to a friend
Very easy setup and connection
Very good for what it is By Rolf on 8/3/2015
Rolf would recommend this product to a friend
I use this for my sump-less nano tank, and as far as I know it was/is the best option available. I like the optical sensor, it works very well. A reset option, like another reviewer recommends, would be nice. Would also like the ability to have it actuate any return pump, not just the one included. But it does what it's supposed to, and does it easily and accurately.
great small ato By Salvatore on 8/3/2015
Salvatore would recommend this product to a friend
set up and working within 2 minutes of opening the box. very simple installation with easy instructions. Replaced a malfunctioning tunze nano with this unit, and the difference is night and day. love the idea of no moving parts, and the small size is incredible. Great product been running hassle free since I installed it.
Not reliable. By Jason on 8/3/2015
Jason wouldn't recommend this product to a friend
I purchased one through Amazon and after several emails to the seller and to Coralvue with issues Amazon is refunding me my money. Several times in a day this thing faults out and I need to reset it. A few times it has caused the water level in my sump to go too high causing my skimmer to overflow all the crap back into the water. Coralvue sent me a new part that they assumed would fix the problem. Unfortunately that didn't work. Also they said my sump was too crowded... I have just a 20gal sump on my 90 filled with rock, return pump, and my Diablo 160. I moved all my rock in the sump to hopefully give the photo eye a better view to my water level and I still have issues with it. Ordering a Tunze ato soon.
Works like it suppose to. By Ray on 7/28/2015
Ray would recommend this product to a friend
This is my first ATO I purchased and I was surprised that the installation was easy. And it started filling my sump to the level I set it at. I have only had it for a month so I can't comment on the durability. I figured if you want something that doesn't need attention then you should have a different hobby. This hobby is all about attention to details.
wetside rusts By mack on 5/20/2015
mack wouldn't recommend this product to a friend
Be careful as the wet side splits, rusts out and cause issues in your tank.
spend more money on something better By bryan on 4/30/2015
bryan wouldn't recommend this product to a friend
pump is very cheap and has had to be replaced twice within 4 months, still to this day I come home to a beeping unit and low water in tank because it cant turn the pump on. Very unreliable, only reason i give 2 stars is that it is an optical auto top off for a good price.
Good product By Mike's reef on 3/23/2015
Mike's reef would recommend this product to a friend
I used it for 1 day and it broke. It's not turning on. I think it's just a defect which happens. Brs is going to look at it and I trust they will resolve the issue. Can't wait to get it set back up.
Great design with one flaw By Nick on 1/14/2015
Nick would recommend this product to a friend
This is probably the most simple ATO I've ever used. I've been using the Tunze osmolator for years, wanted to switch it up for my 220G DD. This is simple, set the eye where you want the sump level to be, plug the clear tubing into the nano sized pump that it comes with, plug everything in and thats it. The flaw is when the you use the full length of the tubing and the water level in the reservoir is higher than the sump level. This creates a siphon, easy fix though, just don't use all the tubing and try to not to have your ATO reservoir higher than the sump!
Nice but annoying By marion on 1/13/2015
marion would recommend this product to a friend
I like the ATO and it does exactly what I need but the most annoying part about it is that when the RODI water is low and the alert sounds, you have to physically unplug it to reset it after you have filled your reservoir. A button or an automated function that would reset itself would improve this device a ton. So now you need to keep it in a location where you can easily reach it....every day. After reading some of the other reviews and hearing about the high water alert, I wonder if something is wrong with mine because the alert never sounds when there is too much water.