I have a 315 gallon acrylic tank that i am in the process of setting up. The tank is drilled with 2" bulkheads for use with 1 1/2" pipe. The problem I am running into is, when I have my line from pump into aquarium in, I dont have room to do the durso overflow that I had planned!! Any suggestions? Is there another style that I can use that will still keep the noise level down?