Red Sea ATO+ water level sensor failure

Smithrz

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Just a bit if a public service announcement really, today the sensor probe for the water level on my Red Sea ATO+ failed. The app simply displayed "Error" next to the water level section (other sensor probes seem fine, such as temp, and over fill). The day before it failed, it started doing very small top-ups (around 0.01-0.06ltr) every hour. Thankfully, the pump and everything else still works, so I can simply trigger a top-up manually a couple of times a day.

Red Sea support have said they will send me a new sensor, as it was only bought on October 2023. Now, this may be total coincidence, but on May 16th, Red Sea sent out an email, titled "ReefATO+ preventive maintenance" stating:

"It has come to our attention that in some aquarium systems, the titanium pins of the ReefATO+ level sensor can slowly build up a calcium carbonate or organic coating that can affect their sensitivity. To keep the ReefATO+ sensor at its optimum performance we recommend you do preventative maintenance of the sensor every 3 months to remove any such coatings. This is done easily by soaking the sensor in a weak acid solution (such as regular vinegar) for approximately 20 minutes and rinsing well before returning it to the system. If necessary, you can use a soft brush to remove any stubborn deposits."

So, just on Monday past, I cleaned my sensor with a weak solution of citric acid as it had kinda stopped consistently topping up, so I figured, I must have calcium buildup like the email said. After the cleaning, it went back to it's normal filling routine, and all seemed well... But then 4 days later, it failed. Like I say, it could be total coincidence, as I told Red Sea all of this information, and they still said they'll send me a replacement, and never said anything about the cleaning approach.

Perhaps I've just been unlucky, but this is my first equipment failure on a <1 year old system, and I know that it's a case of when rather than if, with failures; just didn't expect it to happen so soon. Hopefully the newer models have had any underlying issues addressed, but thought I'd share for anyone thinking about getting one; maybe others have reported the same issue, but I'll leave that for you to search for :)

I would add that up until this week, I wouldn't have had a single complaint about the ATO+, it's been great otherwise; and I can still lazily top up from a button press in the app until the new sensor comes. very much a first world problem!
 
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Smithrz

Smithrz

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Update!

The sensor has now completely failed, and as a result, I can no longer operate the pump manually via the app, as it appears to need an active sensor to function.

Had to empty my RO reservoir, and top up by hand with a jug a couple of times a day. Hopefully the new sensor comes this week.
 

The Life Aquatic

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Jumping on this thread as I have the same issue. Did you get your new sensor?

I can't help but wonder if the latest firmware update caused this. The timing of your issue and mine right around a firmware update feels like too much of a coindence.

Either way, I currently don't have a functioning ATO which is a big problem.
 

BryanS

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I had the exact same issue, sensor failed after maybe 8 months of use. The real kicker for me was that I had bought it from my local LFS and can't figure out where I'd put the paper receipt from the purchase... and Red Sea won't warranty anything without providing proof of purchase. I wish they had some mechanism to see that the serial number of the device went live in reefbeat on X date and use that for warranty. That policy really makes buying locally or giving their products as a gift something I'd reconsider. I had to buy a new sensor and everything is working again for the time being.
 

rnaber

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I had the same issue just this week, 9 months after purchase! RedSea is sending me a new sensor, and they told me that the new model is "improved". For me I got an error that the pump ran for too long so it was stopped, event though the RO reservoir was full and the sensor was fully submerged. In the app the level keeps showing below sensor, even when the sensor is submerged. Good thing the pump didn't keep running and flooded my cabinet!
 
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Smithrz

Smithrz

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Jumping on this thread as I have the same issue. Did you get your new sensor?

I can't help but wonder if the latest firmware update caused this. The timing of your issue and mine right around a firmware update feels like too much of a coindence.

Either way, I currently don't have a functioning ATO which is a big problem.
They sent me a new sensor yeah, and all works well again. Sorry for the late reply!
 

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