hang on overflow backup idea

[adidas]

I've got a cpr overflow, and last night the tank overflowed (the powerhead that keeps the syphon going must have crapped out) got it going again but i'm very paranoid about it. I had an idea for a flood fail-safe, I thought i'd run by you guys...

has anyone ever tried putting almost like a gutter around the outside of the tank? like using silicon to stick 1" pvc, cut in half, around the outer edge with a slope and a couple pipes draining to the sump? My tank is in wall and i could have it out of view.

thoughts?