If you were going to drill a tank for the overflow box, would you bring the return line over the top or would you drill a hole in the tank for this?
And why?
Also, if drilled, what is a good placement for the return line hole and does it need to be protected from fish/snails/etc entering?
And why?
Also, if drilled, what is a good placement for the return line hole and does it need to be protected from fish/snails/etc entering?