I am thinking about buying a 125 gallon tank. Would running 2 mp40's in the tank and a 9.5 mag pump in the sump be better or 1 mp40 in the tank and a mag 18 pump in the sump? The tank is drilled with 2 internal overflows, one on each side of the tank
Difinitely stick with the two MP40's and the 9.5 or a more energy efficient pump. Plus, if you are going to have a sump/ fuge. You wont want a ton of flow going through it so there is longer contact time with the skimmer and the Macro.