Ato suggestions for red sea max e260

[fishyfishfish]

Hi guys recently purchased a red sea max e 260 (stayed with the rear sump) could anyone recommend a trustworthy ato?
Im currently topping up every 2 days, i have found my sweet spot for the skimmer to work as intended. Just need to keep the water level right at all times.
Would be greatly appreciated.
:)

 

[Rocks reef]

Tunze makes some of the best ATO's out there!

I would recommend the Tunze 3155

 

[X-37B]

Get the new 3154. No float valve or controller. It's all in the new sensor.
I run 4 of them. They also make a nano version I run on my 15g.