what is better?


Premium Member
I'm using a quiet one 4000 on a 120g; however I will be running a closed loop system down the road for more flow.


Premium Member
Both good pumps. If your gonna run internal, I think the quiet one runs a little cooler. If your gonna run external, Quiet One would be my choice. Mag does not recommend running their pumps external, though a lot of folks do with no problems. I've had both.