Since I am getting my 180 soon, I am wondering if I should pay my LFS to drill 1.75" holes in the back of the tank, or just buy an overflow box. If I did drill, I would have the holes where the water level would be. So in a power outage the water would go below the bulkheads. Here is a diagram:
The top left are the in-flow bulkheads and the 2 in the middle are the returns. Which leads me to my next question... should I have the return lines go above the tank, like a hang over tank tube. Or keep it how it is on the diagram, and put a check valve on there? Thanks!
The top left are the in-flow bulkheads and the 2 in the middle are the returns. Which leads me to my next question... should I have the return lines go above the tank, like a hang over tank tube. Or keep it how it is on the diagram, and put a check valve on there? Thanks!