The title says it all, tank is 150gl wide and I think the overflow is 2" PVC
(it may be bigger!). I purchased it already drilled. It's currently at my mothers an hour away, she's got a huge basement where we built the stand. I'm going there Sunday so I could check the exact size. I'm quite sure I have to go external because the sump is drilled in a low corner. Just looking for suggestions on size and brand. Thanks in advance for help!