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.
Bad Operating Design - OVERFLOW ALARM By Pipe Doctor on 12/25/2014
Pipe Doctor wouldn't recommend this product to a friend
I've used mechanical ATO's for several years and work directly off my RO/DI unit and decided to try an electronic ATO. The Tunze was too complicated with poorly written English manual. Then I tried the AutoAqua. Nice with one MAJOR FLAW - I use an Apex Neptune controller and when the system feeds, the return pump turns off and raises the water level in the sump which causes a NON-RESETTABLE overflow error on the ATO. When you feed multiple times a day, this ATO becomes a complete waste. Now I use Avast ATO which I wire directly to my Neptune breakout box which turns on a small pump from my top off water tank. If anyone wants a practically new ATO, look me up on ReefCentral.
Worth the wait By Ryan on 11/30/2014
Ryan would recommend this product to a friend
I waited a couple months for this auto top off to come off of backorder but it was worth the wait this thing works flawlessly and when there is something wrong it lets you know whether it is the eye is blocked or the water is empty to bucket.
Works as advertised By Randy on 11/24/2014
Randy would recommend this product to a friend
It has been 3 weeks and it has been flawless in my Trigger Systems sump. I do unplug its power when I do water changes,
so I don't get any alarms when the sump level rises. As soon as The levels are back to normal I plug it back in and it resets and runs normally. Best feature is the small pump which slips right into a 5 gallon Jug with no problem.
Nice idea, but needs work By Scott on 11/19/2014
Scott wouldn't recommend this product to a friend
I bought this for my 180 gallon and have it installed in my 125 gallon sump. I have to reset this thing daily. What I've found is that anytime there is an overflow condition the alarm goes off as expected, however once the overflow is corrected, it doesn't reset itself. For example, I have an Apex controller that turns off the return pump during feedings, which increases the water volume in the sump (causing the overflow condition). After the feeding cycle has completed and the water level restored to normal in the sump, the ATO stays in the alarm state. So it won't top off until reset. Which is usually when I get home so my salinity levels increase during the day, then drop back down quickly once I reset.
If your water level in your sump remains fairly constant, go for it. If not, then go with something else.
Small accurate and smart! By jeremy on 11/1/2014
jeremy would recommend this product to a friend
This entire ato is really small. The optical eye can fit in the smallest of sumps or Nanos. The pump is small yet powerful and will fit into just about any change opening you have in mind. I can't imagine this ato taking anyone longer that 2 mins to install. It let's you feel confident that accidents will not Happen. I test things cause I believe an ounce of prevention is worth a pound of cure. This ato will not let itself run for longer than a min with out throwing an alarm. It alarms when it needs water too. Basically it knows it's job and how to do it. It will always error to not add water. Price. Size. Reliability. Intelligence. An easy choice in the world of faulty float switches and over complicated units. Buy this one and save the hassle of the other brands.
Works like a charm By chris on 10/25/2014
chris would recommend this product to a friend
I bought this ATO 6 months ago and it has worked just as advertised. I really like how it tops off the water often and in small amounts. Its very quiet and SUPER easy to install. The only downside of the system is that the power cord for the pump is pretty short. You can buy an extension for 20 bucks though. I liked it so much i bought a second one for my other tank. i did have a problem with the second where it sensed that the water was low and started pumping in water and never stopped. I contacted the company and i had a replacement in my mail box in 3 days. amazing product.
overfilling condition fix By Patrick on 10/20/2014
Patrick would recommend this product to a friend
CON: instruction manual didn't tell you everything.
PRO: easy to install, no moving parts (float switches) smart controller.
FIX: must overflow conditions occurs do to siphon not breaking from reserve tank to sump, or aquarium. Using the right amount of return tubing and running your line so the siphon breaks after a fill prevents over fill errors. NOTE: as with any ATO I advise you never have too big of an reserve, only enough so you don't cause salinity issues.
So Simple but robust By CodeWorker on 10/2/2014
CodeWorker would recommend this product to a friend
After reading many about many other products i got this one. very simple to hook up, easy to use, and works with out any floats. It does keep track of how much water is pumped. so if it goes over that amount it will shut off and beep to let you know there is a problem. I have had it work and protect me from adding to much fresh water when i did a water change. i forgot to shut it off and after it added the normal 2 cups it stopped and beeped. it tops off quick and has worked flawless for 6 months now. I am planing on using one on a 16 gallon nano tank soon.
Keep Simple easy By SRomero on 9/25/2014
SRomero would recommend this product to a friend
It's been a year and rocking, not a single beep after installation,simple way to get everything on the perfect level, not frustrating issues with the skimmer, miniature size and 100% reliable.
Great product By Paulf757 on 9/1/2014
Paulf757 would recommend this product to a friend
Very simple setup.
Boom!!! set it up in less than 2 minutes out the box and.... By TD on 8/28/2014
TD would recommend this product to a friend
it works too! yes more expensive but super easy, appears to be reliable, and good for reefers like me that aren't too "tech-eee" and don't wanna worry about 2 float switches and keeping them working properly. just do it, do it.
awesomeness By ReeferDre on 8/15/2014
ReeferDre would recommend this product to a friend
I've used a good amount of ATO over the years and this is by far the easiest to set up,use, and clean. The directions could be a bit better but as a product itself absolutely awesome. I wish all reefing products worked as well as this. I have replaced the all ATO's I have with these.
Works as described, no problems here and easy set up!!! By Michael on 8/6/2014
Michael would recommend this product to a friend
Set up was super easy, I installed it, tested it, and have been using it problem free. I needed a good ATO to stabilize water levels in sump. I'm using it on Aqueon Proflex Sump #3 and its a great addition. My OCD made me use some 3m stickies on the output tubing holder instead of screwing it on the acrylic and it holds great! Ya, it's rockin' like Dokken lol!
Works awesome in Picotope By Ben on 7/18/2014
Ben would recommend this product to a friend
I have this ATO in my picotope and it always keeps the water level within 1/4" in the tank. Pump is quiet and I've never experienced the beeping issues that other's have talked about.
My no hassle procedure for a water change is:
-Turn off ATO
-Replace water to level where I want it
-Turn ATO on
Done, no alarms or anything like that - going on 6 months with this unit.
Durring setup you love it but then... By shawn on 7/2/2014
shawn wouldn't recommend this product to a friend
The safety features sound great but seem to also cause headaches. It is set with a 48 hr no fill alarm that isn't mentioned in the booklet. After setup if it's not activated to fill within the 48 hrs the alatm goes of with blue light. The book says the blue light means misalignment or the lense needs to be cleaned. So you clean it and check alignment, reset it by pulling out power plug. 48 hrs it goes off again. If your tank doesn't evaporate that quickly I dont see a way around this repetitive annoying alarm. It could be a very nice little ATO but appears to be to smart for my setup.