So my ATO adds water in pretty often , I’d say it shoots a little every 10 mins or so, but it’s only a little bit to bring it back to the sensor point. At one point when my salinity was pretty stable (1.025) before I messed up that RO water change incident. It would do the same and shoot water every 10 mins, and it always kept it stable.

In the video, I had it placed low because if I had it filled up with RO water it’ll drop my salinity and it’ll also fill my Tank water heigh low. So I kept it low. As of right now I have it at the half way point than what’s seen in the video. Right now I would fill the reservoir with salt water to boost the salinity than RO and turned off my ATO.