Vortech Mp40?

[JDigital]

I've got a 60G 40x18x20 tank.

I'm running 2 MP10's. One on either end of the tank in anti-sync mode. I get really good random flow patterns, very few dead spots, and I can vary the flow depending on the coral requirements.

1 MP10 likely won't be enough for a 50G tank unless you are going for a full soft coral tank. If you want SPS you will need more flow IMO.

I don't think an MP40 is overkill for a 50G tank as it puts out just a bit more flow than 2 MP10's (both on 100%), but the benefit of syncing 2 10's together would be better than just having 1 MP40 IMO.