Overflow Help

[kjb1000]

Hello All

I have a FX5 on my 750l and would like to have a sump but dont want to drill tank wondered if i could have some pic of any overflow designs.

I attach a pic of my tank any ideas on how to get water out with no chance of over flowing?

Also what size pump will i need? sump i plan to have will be around 30" x 18" x 18" with as much sponge in as poss as run FX5 with mainly Bio

Thanks

 

[BadOleRoss]

I'd go with one of these is I had to add an overflow box.
http://www.lifereef.com/siphon.html