Seting up a Cube tank, need advice

[prosnow]

i'm currently getting a cube tank built, 20x20x20
and am going to be using a 10 gallon tank as my sump,
i was wonder what kind of pump i should use as a return i was thinking of something along the lines of a mag 950, and split that 2 way so i can get some extra flow out of it, or do u think this is a bad idea? i am hoping to not put any kind of powerhead or anything else in the tank itself,

any suggestions are welcome,

thanks Matt

[mr_alberta]

How are you going to be setting up the overflow box? External, HOB, etc?

Are you going to be drilling holes anywhere for returns or are they all going to be over the back?

[prosnow]

internal over flow box, with a hole drilled at the back,

no holes drilled for returns just over the top.

[muck]

closed loop..?

[prosnow]

lol, no, no closed loop