Can’t keep 25 lagoon AIO return chamber water level up

[Northern Flicker]

To me it kinda looks like your ATO sensor is really deep in the middle chamber.

You want it to fill the water high enough that it just barely cascades from the heater chambers into the middle chamber.

I ran this tank with the pump always cranked to its highest so its not a pump issue.

 

[J A' mhuir]

To me it kinda looks like your ATO sensor is really deep in the middle chamber.

You want it to fill the water high enough that it just barely cascades from the heater chambers into the middle chamber.

I ran this tank with the pump always cranked to its highest so it’s not a pump issue.

hey, yes indeed it was. I did solve this issue. With adding water to the main Display. Now it’s just about 1/4 inch cascade. Running pump full. I am thinking of switching to two IOAOI Nano Return pumps. See if I can get that extra maybe 70gph.
Thanks for your suggestions!!