In the DT im using a standard AGA RR overflow with a durso. I'll more likely than not be using a similar set up for the fuge. as for my flow, stil trying to decide how big a pump to go with. I think that my current mag 12 can handle it all by itself but kinda like the idea of two pumps. If I use only the mag 12, I was thinking it wont matter too much that i lose some return flow in the DT b/c i have two voretchs in there but will that affect my evaporation. Obviously it'd be best if i never saw a noticeable diff in water level in either the fuge or the DT