The jump from fw to sw

[gottafindnemo]

Someone from a local reef group is selling me this, hydor controller good for 2 power heads along with a 425 gph, so im gunna hook the one im getting on this sale and the 425 that i already have up to the controller and have them mid level in my tank, then im gunna have my 600 gph top level above my heater pointed down to help circulate temp as well