remote refugium

i need some ideas on how to go about installing a remote refugium i have a 30gallon sump which i like alot. i have a 10 gallon tank i want to make a refugium from i want to but it beside my sump how should i go about connecting the two all i can think of is having 2 pumps on in the refugium and 1 in sump. i was just wondering if anybody else had sum better ideas.

I'm not a salt person.. But if you could find a 10g with one hole drilled in it then it could gravity feed.
Or you could get one of the big plastic bins and do the same thing, It would at least eliminate one pump and cut down the cost some. If there would be a way to gravity feed from sump to refuguim then you would only need one pump.