red sea desktop

Hello, I've just setup my red sea desktop ATO however i dont think it's working right. I believe the water level in the return pump section of the tank (where the ATO bulb is) is too low causing the ATO to keep filling up the tank too much. The other section of the filtration chamber just fills...

I have just setup a red sea desktop peninsula however it appears that the overflow drain is not working correctly. It seems to be... Well... Overflowing. It is meant to drain into a little hole in the far right of the plastic overflow grating peice but just fills up too fast and overflows into...