ato failure

I have a Tunze 5017 ATO in my Red Sea Reefer 250 sump that's about 3 months old and I can't get the water level in my return to stay consistent. It's like it has a mind if its own. I will have the water level set and the ATO will come on and keep it consistent for a while but then the water...

I need some emergency recommendations. evidently my first rear Waterbox filter chamber got clogged. Water has been spilling over the diverter. For some reason the third chamber has been low ( still investigating why) and my spouse woke me up and said the Osmolator has been running off and on...