Were to drill and gph?

[Rsquared333]

I am thinking of going from a 46 bf to a 50 gal Tall so I could keep all my same lighting and equipment but be able to not have the risks of an overflow since I cannot drill my bf. The question I have is were do I drill the hole and how do I figure out the gph I will get from it? I have a mag 7 return pump that runs at about 500 gph at 3' how large would the drilled hole need to be?

[tinman]

I found this article that says " 1" ~ 900gph; 1.5" ~ 1800gph " about pipe size... here is the article

http://www.reefs.org/library/newbieguide.htm

[Rsquared333]

thanks alot

[seaham358]

I thougt 1" was 600 gph??? may want to research this more.