Help with outflow

[digi]

Originally Posted by Slick Fork

It might be workable. I would be more inclined though to go back to an external type stockman and silicone an overflow box INSIDE the tank.

It's a PITA to do it without removing livestock but it can be done.

I'd like to get an overflow happening inside the tank too. This was my first overflowy setup ever, and I really didn't do my research before getting into it... I never imagined a slurp noise would happen.

Anyways, how is it possible to add an internal overflow with livestock? Won't silicone screw up the water? How will the silicone cure? Also, keep in mind how high my hole is drilled.

...I think I'm hoop'd in every way possible.