A mag 9 may be a little much for the over flow how big (dia) is the drain a 1 in pipe flows around 650 gph The power heads will give you good flow but i'd go with two 1050's or a mix of one 1050 and one 750 Im running a 750 in my 20L and it's not as much as it seems[/QUOTE
Would using a mag 9 be detrimental to my system? I found a really good deal for one on CL.