Hello, first off beautiful tank build!!
As for you return vs overflow. They should be Equal?!?! The overflow can only process the water going into the tank. Check and make sure you don't have a obstruction in the return plumbing that's working like a check valve in reverse, ie snail shell or similar blocking the flow.
Good luck!!
As for you return vs overflow. They should be Equal?!?! The overflow can only process the water going into the tank. Check and make sure you don't have a obstruction in the return plumbing that's working like a check valve in reverse, ie snail shell or similar blocking the flow.
Good luck!!


