TheRock wrote:

I'm not capping my sump...unless there is a way I can restrict entry to the
overflow.

Well, I've also read accounts of "eel-proofing" the overflow, but I've not seen
details of how it's done. Just off the top of my head, I'd say that a commercial
grate from something like a cannister filter could be attached to the end of a
siphon-type overflow, and perhaps small lighting grate could be placed over the
built-in type.

George Patterson
Forgive your enemies. But always remember who they are.