Need a new ATO

DoriReef · 2026-11-06T08:22:35-0500

Hey so I usually fill my tank up every day morning and night cuz I am scared for an ATO will fail and overflow. I am going away during Christmas time for a week so need an ATO, I currently have the N-Fill smart ATO that has a shutoff if ran for 90 seconds but that can turn back on and go for another 90. Are there any ones you guys recommend out there? I have a 25 IM aio.

Gumbies R Us · 2026-11-06T08:28:20-0500

Tunze Osmolator! They are the best ATOs I can think of. I have one for my tank and have never once had any issues with it

Gobiidae · 2026-11-06T08:38:06-0500

If you’re ok with Amazon products, I’ve had no issues with the Fzone ATO. It’s a single optical sensor and has a failsafe. I believe the basic version ~$40 right now which I am using on two tanks.

DoriReef · 2026-11-06T09:07:06-0500

Gumbies R Us said:
Tunze Osmolator! They are the best ATOs I can think of. I have one for my tank and have never once had any issues with it

Have you heard anything about the nano? Confusing I have a 25g and it is $100 cheaper would go with that, but seems like it’s newer

DoriReef · 2026-11-06T09:07:45-0500

Gobiidae said:
If you’re ok with Amazon products, I’ve had no issues with the Fzone ATO. It’s a single optical sensor and has a failsafe. I believe the basic version ~$40 right now which I am using on two tanks.

Seems to be a bunch of bad reviews on it, so glad it has been good for you so far

Gobiidae · 2026-11-06T09:09:43-0500

Yea for sure, that’s why I always try to lead with “if you’re ok with Amazon products”

Mr. Mojo Rising · 2026-11-06T09:12:48-0500

My Kamoer ATO's have never let me down yet, one is 5 years old the other is 4 years, not a single failure to date.

Bmaytime · 2026-11-06T09:51:29-0500

Why are you scared of the N-Fill failing? Have you had an overfill? N-fill It’s pretty reliable, if you are worried about an ATO failing you can add a smart plug and only have the ATO turn on for 2 mins a couple times a day.

exnisstech · 2026-11-06T10:09:48-0500

I use a single sensor cheap unit from Amazon, two kamoer units, an old osmolator and two osmolator 3 as well as old jbj units no longer made. I've not had any fail. Some people use ones that are a bottle that's sits on top of a nano tank. Everything manufactured has a risk if failing.