1 mp40 for 40 gallon cube?

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ScottsTot

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Is an mp40 qwd too much for a 40 gallon cube (24 x 20 x 20)? Also, would the mp40 take up too much space in the tank?
 
I've got 2 mp10s and 2 pp8s on my 60 cube. I've got plenty of flow but they are running at about 90%. Mp10s on reefcrest and the pp8s make a standing wave in the tank.

I think 1 mp40 would work but you may be better off with multiple pumps for more varied flow patterns
 
1 MP40 1 MP10 has my vote.
 
I'd definitely go with 2 pumps, either 2 MP10s or an MP10 with an MP40. Placed on opposite sides of tank and set in anti-sync mode makes about the most random and chaotic flow, IMO. I ran 2 MP40s on my 36"x 24" 90 in that manner, probably at 50% or so power, and the tank was always rocking and rolling. I believe a 40G cube is probably about 21"x 21", so if you have them opposite each other MP10s would be plenty (again, IMO).
As for taking up space, you won't find a pump that takes up less space in the tank. The 40 is obviously bigger than the 10, but inside the tank neither takes up much space. The trade off is having the motors on the outside, of course, but I've never minded that.
 

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