Hello~ Me after 2 years of being in freshwater , finally dared to venture out into marine ! Decommed my 422 fresh, and just made an order today for 4x2x1.5 with internal overflow down to sump ! I know i will for sure be facing a lot of problems in marine only started reading reef forums and gaining as many knowledge as possible for like 1month ? and then jumping into it . I'm digging my own pit LOL so here's the specs that is confirmed and bought ! - 4x2x1.5ft height with front pan