Best budget ATO system?

vokrey09 · Sep 4, 2019

I'm just restarting my 40 breeder tank. I had a tunze osmolator 3155, but looks like the controller unit got wet when I took my last setup down and it's not turning on :/

What ATO would you recommend? Looking to not break the bank, I have an auto shut off float already glued to the rim of the tank that I'll be plugging whichever ATO I buy into (so factory backup fail-safe is supercritical).

Silent · Sep 4, 2019

I really like this https://www.bulkreefsupply.com/jbj-a-t-o-water-level-controller.html but Im not sure if this is "budget" to you. You could simply do a gravity ATO with a float.

SinCityRee4r · Sep 4, 2019

check out the reefbreeders ato this is what i use and it comes with the pump like the smart ato

Huff747 · Sep 4, 2019

Depending on your definition of budget I used the Tunze Nano on my 40 breeder. If you have a Tunze already you could reuse the pump and keep the new pump as a backup, or use the new pump and have the old pump as a backup.

vangvace · Sep 4, 2019

https://www.bulkreefsupply.com/smart-ato-micro-120p-auto-top-off-system-autoaqua.html this one. I ran it on both my nanos.

DesertReefT4r · Sep 4, 2019

Their are some cheap china made ones. I like the JBJ ATO, used it for years with no issues. Autotopoff.com is another low priced option.

lpsouth1978 · Sep 4, 2019

DesertReefT4r said:
Their are some cheap china made ones. I like the JBJ ATO, used it for years with no issues. Autotopoff.com is another low priced option.

I use an autotopoff.com dual switch unit on my 40B and love it. I have never had an issue with their ATO's. They have no bells and whistles but they work and are VERY reliable.

Crimsonphoenix · Sep 4, 2019

I have a 36 bow with a 15 sump and use a gravity fed 5 gal jug with a $25-30 float valve system and it is great — reliable and not dependent on electric.

ChaetoFarm_Kai · Aug 29, 2022

I’d personally get a used 3155 on marketplace or eBay and use that, then you’ll have some extra parts as well. They can be had for around $90-150. If you’re sure your sensors are good, you might even be able to find one with a bad optical sensor on eBay for ~$50. Just make sure the controller is functioning properly. The sensors are easily unplugged and swapped by simply opening the controller housing. I run a used 3155 that I repaired and will soon be installing an additional float switch in my sump to shut off my skimmer, ATO, and eventually a roller filter when the water level rises as as extra insurance.

LeftyReefer · Aug 29, 2022

I use a Auto Aqua Smart ATO LITE on my 40b.
It's definitely budget friendly at only $45. but it's a single optical sensor unit.

HudsonReefer2.0 · Aug 29, 2022

I am the ato. Budget all the way. I’m also the apex

ChaetoFarm_Kai · Aug 29, 2022

HudsonReefer2.0 said:
I am the ato. Budget all the way. I’m also the apex

I wish I had as much time on my hands as this guy. Fortunately my logic and technical skills far exceed my ability to dedicate 24 hours a day to monitoring and taking care of my reef.

Scottrshoe · Aug 29, 2022

I have not had long term experience with it, but this working well for my 20g so far. Always a risk with any ATO system, but this included everything but the 5 gal bucket. I just wipe off the sensor with every WC.