I just have the cpu in there. But the air in the return line is like a brick wall. I have no idea how I got the last pump going.
With my gpus I have the res above everything and it just bleeds right out.
Here as you can see the end of the return is downhill. If I put the return through the side of the cooler it would work great I bet, but that's a lot of work I don't plan to do.
I should just let a few gallons out and put a hole through the side, then the air would have nowhere to get trapped. Simple solution, pain in the ass to do. I think I'll try the submersible first though as it should be much quieter.
I'm going to have the same problem with the submersible in the return line. This blows.