I found the problem. ATI support emailed me and said it’s because of overheating. I’m supposed to rotate one the units backwards because the exhaust is blowing into the other unit which is causing it to blink. When I opened the canopy doors it stopped blinking. And when I tested them outside the tank they worked too. Also the unit only blinks after it’s been running for some time.
The only problem is trying to adjust the settings while the unit is backwards. That might be very difficult, but I’ll only set it one time and it’ll be good to go!
Im very happy now. Also, my younger brother surprised me with this massive blue tang. It’s literally 10 years old. I’ll have to show pictures, but I don’t think my tank is big enough for it.
Thank you guys. I needed to learn that taking a break is best even though I want to keep working on the tank.