BIG potential problem...Overflow leaking.

[Doug]

The overflow on my last 180 leaked. I could not seal it with water in the tank, no matter how hard I tried.

I made stacks, with no slots or duraso, etc. They were almost to the tanks water level. This kept any excess water from returning to the sump. In order to keep animals from the stacks, I glued eggcrate inside the pipe at the top.